Tube Amp Network | beelzebum | Activity https://tubeampnetwork.com/members/beelzebum/activity/ Activity feed for beelzebum. Sun, 30 Aug 2026 15:38:18 +0000 https://buddypress.org/?v= en-US 30 hourly 2 9448101c5f2aee222001b182801664ff beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5984 Fri, 14 Feb 2014 13:49:57 +0000 To start off, here is a link to some very useful information.

http://www.diyparadise.com/tubeloadline/tubeloadlines.html

All things being equal to someone else’s amp (voltage, bias, load) then a similar tube should sound similar in your amp. The load is your speaker, and every speaker responds differently to different frequencies, meaning the…[Read more]

]]> 0 9448101c5f2aee222001b182801664ff beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5984 Fri, 14 Feb 2014 13:49:57 +0000 To start off, here is a link to some very useful information.

http://www.diyparadise.com/tubeloadline/tubeloadlines.html

All things being equal to someone else’s amp (voltage, bias, load) then a similar tube should sound similar in your amp. The load is your speaker, and every speaker responds differently to different frequencies, meaning the…[Read more]

]]> 0 9448101c5f2aee222001b182801664ff beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5984 Fri, 14 Feb 2014 13:49:57 +0000 To start off, here is a link to some very useful information.

http://www.diyparadise.com/tubeloadline/tubeloadlines.html

All things being equal to someone else’s amp (voltage, bias, load) then a similar tube should sound similar in your amp. The load is your speaker, and every speaker responds differently to different frequencies, meaning the…[Read more]

]]> 0 9448101c5f2aee222001b182801664ff beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5984 Fri, 14 Feb 2014 13:49:57 +0000 To start off, here is a link to some very useful information.

http://www.diyparadise.com/tubeloadline/tubeloadlines.html

All things being equal to someone else’s amp (voltage, bias, load) then a similar tube should sound similar in your amp. The load is your speaker, and every speaker responds differently to different frequencies, meaning the…[Read more]

]]> 0 9448101c5f2aee222001b182801664ff beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5984 Fri, 14 Feb 2014 13:49:57 +0000 To start off, here is a link to some very useful information.

http://www.diyparadise.com/tubeloadline/tubeloadlines.html

All things being equal to someone else’s amp (voltage, bias, load) then a similar tube should sound similar in your amp. The load is your speaker, and every speaker responds differently to different frequencies, meaning the…[Read more]

]]> 0 440bba1c4106f8999caef8f9d32d840d beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5982 Tue, 04 Feb 2014 02:41:50 +0000 It would be easy to just list tubes that I like for various reasons, but that would not be benificial to you. A power tube’s sound depends on a lot of other factors. Even though people are following the same basic schematic, your choice of speaker, power supply, output transformer, and preamp tube will affect the power tube’s sound. It would be…[Read more]

]]> 0 440bba1c4106f8999caef8f9d32d840d beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5982 Tue, 04 Feb 2014 02:41:50 +0000 It would be easy to just list tubes that I like for various reasons, but that would not be benificial to you. A power tube’s sound depends on a lot of other factors. Even though people are following the same basic schematic, your choice of speaker, power supply, output transformer, and preamp tube will affect the power tube’s sound. It would be…[Read more]

]]> 0 440bba1c4106f8999caef8f9d32d840d beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5982 Tue, 04 Feb 2014 02:41:50 +0000 It would be easy to just list tubes that I like for various reasons, but that would not be benificial to you. A power tube’s sound depends on a lot of other factors. Even though people are following the same basic schematic, your choice of speaker, power supply, output transformer, and preamp tube will affect the power tube’s sound. It would be…[Read more]

]]> 0 440bba1c4106f8999caef8f9d32d840d beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5982 Tue, 04 Feb 2014 02:41:50 +0000 It would be easy to just list tubes that I like for various reasons, but that would not be benificial to you. A power tube’s sound depends on a lot of other factors. Even though people are following the same basic schematic, your choice of speaker, power supply, output transformer, and preamp tube will affect the power tube’s sound. It would be…[Read more]

]]> 0 440bba1c4106f8999caef8f9d32d840d beelzebum replied to the topic Different output tubes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/different-output-tubes/#post-5982 Tue, 04 Feb 2014 02:41:50 +0000 It would be easy to just list tubes that I like for various reasons, but that would not be benificial to you. A power tube’s sound depends on a lot of other factors. Even though people are following the same basic schematic, your choice of speaker, power supply, output transformer, and preamp tube will affect the power tube’s sound. It would be…[Read more]

]]> 0 e2d39158a2bc5a5fe7af99b66b7469d1 beelzebum replied to the topic the silence is deafening in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/the-silence-is-deafening/#post-5951 Mon, 14 Oct 2013 09:58:37 +0000 It sounds like your 1/4″ plug is shorting. Shrink wrap the wires separately before screwing the plug together.

]]> 0 e2d39158a2bc5a5fe7af99b66b7469d1 beelzebum replied to the topic the silence is deafening in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/the-silence-is-deafening/#post-5951 Mon, 14 Oct 2013 09:58:37 +0000 It sounds like your 1/4″ plug is shorting. Shrink wrap the wires separately before screwing the plug together.

]]> 0 e2d39158a2bc5a5fe7af99b66b7469d1 beelzebum replied to the topic the silence is deafening in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/the-silence-is-deafening/#post-5951 Mon, 14 Oct 2013 09:58:37 +0000 It sounds like your 1/4″ plug is shorting. Shrink wrap the wires separately before screwing the plug together.

]]> 0 e2d39158a2bc5a5fe7af99b66b7469d1 beelzebum replied to the topic the silence is deafening in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/the-silence-is-deafening/#post-5951 Mon, 14 Oct 2013 09:58:37 +0000 It sounds like your 1/4″ plug is shorting. Shrink wrap the wires separately before screwing the plug together.

]]> 0 e2d39158a2bc5a5fe7af99b66b7469d1 beelzebum replied to the topic the silence is deafening in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/the-silence-is-deafening/#post-5951 Mon, 14 Oct 2013 09:58:37 +0000 It sounds like your 1/4″ plug is shorting. Shrink wrap the wires separately before screwing the plug together.

]]> 0 bc23cd79492cfeee1047ede9df4fcee6 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/page/3/#post-5876 Sat, 08 Jun 2013 14:01:17 +0000 I looked at the images you have. I can’t tell from the image, but do you have both resistors installed on your input jack. I couldn’t see the 68k grid stopper between the jack tip and pin 2 of the 12ax7.

]]> 0 bc23cd79492cfeee1047ede9df4fcee6 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5876 Sat, 08 Jun 2013 14:01:17 +0000 I looked at the images you have. I can’t tell from the image, but do you have both resistors installed on your input jack. I couldn’t see the 68k grid stopper between the jack tip and pin 2 of the 12ax7.

]]> 0 bc23cd79492cfeee1047ede9df4fcee6 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5876 Sat, 08 Jun 2013 14:01:17 +0000 I looked at the images you have. I can’t tell from the image, but do you have both resistors installed on your input jack. I couldn’t see the 68k grid stopper between the jack tip and pin 2 of the 12ax7.

]]> 0 bc23cd79492cfeee1047ede9df4fcee6 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5876 Sat, 08 Jun 2013 14:01:17 +0000 I looked at the images you have. I can’t tell from the image, but do you have both resistors installed on your input jack. I couldn’t see the 68k grid stopper between the jack tip and pin 2 of the 12ax7.

]]> 0 bc23cd79492cfeee1047ede9df4fcee6 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5876 Sat, 08 Jun 2013 14:01:17 +0000 I looked at the images you have. I can’t tell from the image, but do you have both resistors installed on your input jack. I couldn’t see the 68k grid stopper between the jack tip and pin 2 of the 12ax7.

]]> 0 034c6603801910700567f597fe2469ac beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/page/3/#post-5874 Fri, 07 Jun 2013 20:17:21 +0000 Is there any change when you switch the boost switch? Also where are you grounding the tone and volume pots. If you are grounding them back to the pot cans themselves, then are they even making a good ground? If you can post some pictures, that would be helpful.

]]> 0 034c6603801910700567f597fe2469ac beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5874 Fri, 07 Jun 2013 20:17:21 +0000 Is there any change when you switch the boost switch? Also where are you grounding the tone and volume pots. If you are grounding them back to the pot cans themselves, then are they even making a good ground? If you can post some pictures, that would be helpful.

]]> 0 034c6603801910700567f597fe2469ac beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5874 Fri, 07 Jun 2013 20:17:21 +0000 Is there any change when you switch the boost switch? Also where are you grounding the tone and volume pots. If you are grounding them back to the pot cans themselves, then are they even making a good ground? If you can post some pictures, that would be helpful.

]]> 0 034c6603801910700567f597fe2469ac beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5874 Fri, 07 Jun 2013 20:17:21 +0000 Is there any change when you switch the boost switch? Also where are you grounding the tone and volume pots. If you are grounding them back to the pot cans themselves, then are they even making a good ground? If you can post some pictures, that would be helpful.

]]> 0 034c6603801910700567f597fe2469ac beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5874 Fri, 07 Jun 2013 20:17:21 +0000 Is there any change when you switch the boost switch? Also where are you grounding the tone and volume pots. If you are grounding them back to the pot cans themselves, then are they even making a good ground? If you can post some pictures, that would be helpful.

]]> 0 7b9988ab202c80d526bf75c91878940b beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/page/2/#post-5871 Fri, 07 Jun 2013 13:21:25 +0000 The 68k feedback resistor must be measured out of circuit. if you look at the schematic, one end ties to the top of the 1.5k cathode resistor, which itself is tied to ground. On the other end, Of the 68k, it is tied to the output transformer, which is also tied to ground. The output transformer will show almost no resistance when measured with the…[Read more]

]]> 0 7b9988ab202c80d526bf75c91878940b beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5871 Fri, 07 Jun 2013 13:21:25 +0000 The 68k feedback resistor must be measured out of circuit. if you look at the schematic, one end ties to the top of the 1.5k cathode resistor, which itself is tied to ground. On the other end, Of the 68k, it is tied to the output transformer, which is also tied to ground. The output transformer will show almost no resistance when measured with the…[Read more]

]]> 0 7b9988ab202c80d526bf75c91878940b beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5871 Fri, 07 Jun 2013 13:21:25 +0000 The 68k feedback resistor must be measured out of circuit. if you look at the schematic, one end ties to the top of the 1.5k cathode resistor, which itself is tied to ground. On the other end, Of the 68k, it is tied to the output transformer, which is also tied to ground. The output transformer will show almost no resistance when measured with the…[Read more]

]]> 0 7b9988ab202c80d526bf75c91878940b beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5871 Fri, 07 Jun 2013 13:21:25 +0000 The 68k feedback resistor must be measured out of circuit. if you look at the schematic, one end ties to the top of the 1.5k cathode resistor, which itself is tied to ground. On the other end, Of the 68k, it is tied to the output transformer, which is also tied to ground. The output transformer will show almost no resistance when measured with the…[Read more]

]]> 0 7b9988ab202c80d526bf75c91878940b beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5871 Fri, 07 Jun 2013 13:21:25 +0000 The 68k feedback resistor must be measured out of circuit. if you look at the schematic, one end ties to the top of the 1.5k cathode resistor, which itself is tied to ground. On the other end, Of the 68k, it is tied to the output transformer, which is also tied to ground. The output transformer will show almost no resistance when measured with the…[Read more]

]]> 0 42b17e692631ca29919bd8356e15554f beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/page/2/#post-5864 Thu, 06 Jun 2013 14:00:14 +0000 You stated earlier that when you mute the strings, the static stops. Are these still the symptoms? If so, this sounds more like an induced noise into the input on your preamp tube. By touching the strings of your guitar it ends up eliminating the noise by grounding you to the amps ground. Poking around with the chopstick, depending on where you…[Read more]

]]> 0 42b17e692631ca29919bd8356e15554f beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5864 Thu, 06 Jun 2013 14:00:14 +0000 You stated earlier that when you mute the strings, the static stops. Are these still the symptoms? If so, this sounds more like an induced noise into the input on your preamp tube. By touching the strings of your guitar it ends up eliminating the noise by grounding you to the amps ground. Poking around with the chopstick, depending on where you…[Read more]

]]> 0 42b17e692631ca29919bd8356e15554f beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5864 Thu, 06 Jun 2013 14:00:14 +0000 You stated earlier that when you mute the strings, the static stops. Are these still the symptoms? If so, this sounds more like an induced noise into the input on your preamp tube. By touching the strings of your guitar it ends up eliminating the noise by grounding you to the amps ground. Poking around with the chopstick, depending on where you…[Read more]

]]> 0 42b17e692631ca29919bd8356e15554f beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5864 Thu, 06 Jun 2013 14:00:14 +0000 You stated earlier that when you mute the strings, the static stops. Are these still the symptoms? If so, this sounds more like an induced noise into the input on your preamp tube. By touching the strings of your guitar it ends up eliminating the noise by grounding you to the amps ground. Poking around with the chopstick, depending on where you…[Read more]

]]> 0 42b17e692631ca29919bd8356e15554f beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5864 Thu, 06 Jun 2013 14:00:14 +0000 You stated earlier that when you mute the strings, the static stops. Are these still the symptoms? If so, this sounds more like an induced noise into the input on your preamp tube. By touching the strings of your guitar it ends up eliminating the noise by grounding you to the amps ground. Poking around with the chopstick, depending on where you…[Read more]

]]> 0 4b6c92fc9374add2214c364efa1353b5 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5855 Tue, 04 Jun 2013 09:12:09 +0000 Sorry, there are quite a few schematics floating around for the two stroke. I assume in yours they did not have any screen stopper resistor. This would normally connect between B+ and the screen on pin 4.
The grid leak would be the one on yours connecting pin terminal 6 to ground. The one from pin 5 to 6 is your grid stopper.
So, what the grid…[Read more]

]]> 0 4b6c92fc9374add2214c364efa1353b5 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5855 Tue, 04 Jun 2013 09:12:09 +0000 Sorry, there are quite a few schematics floating around for the two stroke. I assume in yours they did not have any screen stopper resistor. This would normally connect between B+ and the screen on pin 4.
The grid leak would be the one on yours connecting pin terminal 6 to ground. The one from pin 5 to 6 is your grid stopper.
So, what the grid…[Read more]

]]> 0 4b6c92fc9374add2214c364efa1353b5 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5855 Tue, 04 Jun 2013 09:12:09 +0000 Sorry, there are quite a few schematics floating around for the two stroke. I assume in yours they did not have any screen stopper resistor. This would normally connect between B+ and the screen on pin 4.
The grid leak would be the one on yours connecting pin terminal 6 to ground. The one from pin 5 to 6 is your grid stopper.
So, what the grid…[Read more]

]]> 0 4b6c92fc9374add2214c364efa1353b5 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5855 Tue, 04 Jun 2013 09:12:09 +0000 Sorry, there are quite a few schematics floating around for the two stroke. I assume in yours they did not have any screen stopper resistor. This would normally connect between B+ and the screen on pin 4.
The grid leak would be the one on yours connecting pin terminal 6 to ground. The one from pin 5 to 6 is your grid stopper.
So, what the grid…[Read more]

]]> 0 4b6c92fc9374add2214c364efa1353b5 beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5855 Tue, 04 Jun 2013 09:12:09 +0000 Sorry, there are quite a few schematics floating around for the two stroke. I assume in yours they did not have any screen stopper resistor. This would normally connect between B+ and the screen on pin 4.
The grid leak would be the one on yours connecting pin terminal 6 to ground. The one from pin 5 to 6 is your grid stopper.
So, what the grid…[Read more]

]]> 0 70ca5107c43ed3fd8cd8cf7b736840be beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5853 Tue, 04 Jun 2013 06:01:03 +0000 Just to let you know, #45 bulbs are for 3.2V, #44 are for 6.3V. The wrong bulbs might have been accidentally mixed into the batch. As for a slow fading away of sound, that is usually due to a problem with a grid leak resistors. I would check the value of the leak resistor on your power tube, and also that it is well grounded. Static could also be…[Read more]

]]> 0 70ca5107c43ed3fd8cd8cf7b736840be beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5853 Tue, 04 Jun 2013 06:01:03 +0000 Just to let you know, #45 bulbs are for 3.2V, #44 are for 6.3V. The wrong bulbs might have been accidentally mixed into the batch. As for a slow fading away of sound, that is usually due to a problem with a grid leak resistors. I would check the value of the leak resistor on your power tube, and also that it is well grounded. Static could also be…[Read more]

]]> 0 70ca5107c43ed3fd8cd8cf7b736840be beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5853 Tue, 04 Jun 2013 06:01:03 +0000 Just to let you know, #45 bulbs are for 3.2V, #44 are for 6.3V. The wrong bulbs might have been accidentally mixed into the batch. As for a slow fading away of sound, that is usually due to a problem with a grid leak resistors. I would check the value of the leak resistor on your power tube, and also that it is well grounded. Static could also be…[Read more]

]]> 0 70ca5107c43ed3fd8cd8cf7b736840be beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5853 Tue, 04 Jun 2013 06:01:03 +0000 Just to let you know, #45 bulbs are for 3.2V, #44 are for 6.3V. The wrong bulbs might have been accidentally mixed into the batch. As for a slow fading away of sound, that is usually due to a problem with a grid leak resistors. I would check the value of the leak resistor on your power tube, and also that it is well grounded. Static could also be…[Read more]

]]> 0 70ca5107c43ed3fd8cd8cf7b736840be beelzebum replied to the topic Burning through Pilot Light Bulbs in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/burning-through-pilot-light-bulbs/#post-5853 Tue, 04 Jun 2013 06:01:03 +0000 Just to let you know, #45 bulbs are for 3.2V, #44 are for 6.3V. The wrong bulbs might have been accidentally mixed into the batch. As for a slow fading away of sound, that is usually due to a problem with a grid leak resistors. I would check the value of the leak resistor on your power tube, and also that it is well grounded. Static could also be…[Read more]

]]> 0 8a157ec63e1013f9d5b751af76160d04 beelzebum replied to the topic new 6GW8 amp in the forum Effects Design and Construction https://tubeampnetwork.com/forums/topic/new-6gw8-amp/#post-5804 Sat, 23 Feb 2013 07:04:25 +0000 If you use 1/2 of your 12ax7 as an input, 1/2 as a split load (cathodyne) inverter, then use the triode section of your 6qw8s as driver stages to add gain for the pentode section. This should give you the early breakup of the cathodyne, along with the added gain normaly found in a long tailed pair. If you want you can balance the driver stages to…[Read more]

]]> 0 8a157ec63e1013f9d5b751af76160d04 beelzebum replied to the topic new 6GW8 amp in the forum Effects Design and Construction https://tubeampnetwork.com/forums/topic/new-6gw8-amp/#post-5804 Sat, 23 Feb 2013 07:04:25 +0000 If you use 1/2 of your 12ax7 as an input, 1/2 as a split load (cathodyne) inverter, then use the triode section of your 6qw8s as driver stages to add gain for the pentode section. This should give you the early breakup of the cathodyne, along with the added gain normaly found in a long tailed pair. If you want you can balance the driver stages to…[Read more]

]]> 0 8a157ec63e1013f9d5b751af76160d04 beelzebum replied to the topic new 6GW8 amp in the forum Effects Design and Construction https://tubeampnetwork.com/forums/topic/new-6gw8-amp/#post-5804 Sat, 23 Feb 2013 07:04:25 +0000 If you use 1/2 of your 12ax7 as an input, 1/2 as a split load (cathodyne) inverter, then use the triode section of your 6qw8s as driver stages to add gain for the pentode section. This should give you the early breakup of the cathodyne, along with the added gain normaly found in a long tailed pair. If you want you can balance the driver stages to…[Read more]

]]> 0 8a157ec63e1013f9d5b751af76160d04 beelzebum replied to the topic new 6GW8 amp in the forum Effects Design and Construction https://tubeampnetwork.com/forums/topic/new-6gw8-amp/#post-5804 Sat, 23 Feb 2013 07:04:25 +0000 If you use 1/2 of your 12ax7 as an input, 1/2 as a split load (cathodyne) inverter, then use the triode section of your 6qw8s as driver stages to add gain for the pentode section. This should give you the early breakup of the cathodyne, along with the added gain normaly found in a long tailed pair. If you want you can balance the driver stages to…[Read more]

]]> 0 8a157ec63e1013f9d5b751af76160d04 beelzebum replied to the topic new 6GW8 amp in the forum Effects Design and Construction https://tubeampnetwork.com/forums/topic/new-6gw8-amp/#post-5804 Sat, 23 Feb 2013 07:04:25 +0000 If you use 1/2 of your 12ax7 as an input, 1/2 as a split load (cathodyne) inverter, then use the triode section of your 6qw8s as driver stages to add gain for the pentode section. This should give you the early breakup of the cathodyne, along with the added gain normaly found in a long tailed pair. If you want you can balance the driver stages to…[Read more]

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