Tube Amp Network | Site-Wide Activity https://tubeampnetwork.com/activity/ Activity feed for the entire site. Tue, 07 Apr 2026 01:11:00 +0000 https://buddypress.org/?v= en-US 30 hourly 2 8aa8a112038835c2a81b6d740fe712b1 Leebob became a registered member https://tubeampnetwork.com/activity/p/4871/ Mon, 30 Mar 2026 00:52:50 +0000 0 bf5c089b3f53b363d97842bcb2920dd3 cristina.emill became a registered member https://tubeampnetwork.com/activity/p/4869/ Fri, 06 Mar 2026 16:20:36 +0000 0 14bf8b44ce93d87a58a969e5b51b08dd Lee replied to the topic Other amp builds in the forum Amplifier Design and Construction https://tubeampnetwork.com/forums/topic/other-amp-builds/page/2/#post-8589 Tue, 28 Jan 2025 18:24:08 +0000 Andy,

Do you happen to have a detailed photo showing how you wired the solid state rectifier to tube rectifier switch?  I’m pretty sure you can wire the diodes to unused terminals on the tube rectifier socket along with the switch placement, etc. and any cautions about usage.  I’m thinking the only caution would be to either turn the volume d…[Read more]

]]> 0 d7c9f1e239f50f67053dbc0b6c04e855 Justin Klapa started the topic Chassis dimensions? in the forum Cabinet Construction https://tubeampnetwork.com/forums/topic/chassis-dimensions/ Thu, 16 Jan 2025 22:48:12 +0000 Hey folks, first time poster here.  I bought the TS kit and there’s a slight delay in shipping.

Great opportunity to get the combo cab built.

Can anyone supply me with the kit chassis dimensions, as well as the mounting bolt locations from the edge?

]]> 0 0be9143ed8dff60a3dc2c32eefacf292 admin became a registered member https://tubeampnetwork.com/activity/p/4856/ Wed, 15 Jan 2025 12:45:20 +0000 0 78c07f5b78cb9ab67cab2197cec314f1 Justin Klapa became a registered member https://tubeampnetwork.com/activity/p/4855/ Wed, 15 Jan 2025 12:45:14 +0000 0 d62f5f432756abf53d6f74e20f1f1fb8 Slatock1973 became a registered member https://tubeampnetwork.com/activity/p/4852/ Tue, 19 Mar 2024 02:28:20 +0000 0 a469c011c3721da238657bf4fe0e12ed rpulido became a registered member https://tubeampnetwork.com/activity/p/4850/ Sat, 16 Dec 2023 19:26:33 +0000 0 4103aae240bc8d6e971e29d06e25b7fe Andy replied to the topic Voltage readings too low (first build) in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/voltage-readings-too-low-first-build/#post-8537 Tue, 31 Oct 2023 16:58:27 +0000 Sorry this is so late! Glad you figured it out.

What Power Transformer are you using? For our kit, we are using the Hammond 290AX which is 325V.

]]> 0 135b7e99464aad0e9e46ef05760ff1c7 Thomas replied to the topic Voltage readings too low (first build) in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/voltage-readings-too-low-first-build/#post-8536 Thu, 26 Oct 2023 19:55:40 +0000 Figured it out. The original target values from Daves book expect a 325v power feed. The revised schematic and layout are using 275v, which I adopted. This is why its lower

]]> 0 cb87f61eff8bd7ee71998b559ea8f9c0 Thomas started the topic Voltage readings too low (first build) in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/voltage-readings-too-low-first-build/ Wed, 25 Oct 2023 23:41:23 +0000 Just finished my two stroke build using a 125ESE and one 12ax7 (thanks to the revised TAN 1.13.2011 revised 1.0 schematic). I checked voltage readings against D.Hunters book and mine are low. Perhaps I should look into smaller PT dropping resistors?

Tube.   Pin.   Expected vdc.   Measured vdc
6v6.        3.       340-360.               332
12ax7.…[Read more]

]]> 0 82dbab7c96b7ba484a993827a776522d Thomas became a registered member https://tubeampnetwork.com/activity/p/4845/ Thu, 12 Oct 2023 01:39:00 +0000 0 e5a587b8105c80119c4a31eac1d5d16f Chester became a registered member https://tubeampnetwork.com/activity/p/4842/ Sat, 02 Sep 2023 15:50:46 +0000 0 91d9c209a71b68ebf57b1026a98f245e williams changed their profile picture https://tubeampnetwork.com/activity/p/4841/ Fri, 21 Apr 2023 22:53:21 +0000 0 cbb4da2bc150d4d737003241e42e4c91 williams became a registered member https://tubeampnetwork.com/activity/p/4839/ Fri, 21 Apr 2023 22:18:05 +0000 0 3f84e558b99087de354c0f7ad5f3d409 williams became a registered member https://tubeampnetwork.com/activity/p/4838/ Fri, 21 Apr 2023 22:18:02 +0000 0 d94626f007e1ff7278efa89986c965c7 mike became a registered member https://tubeampnetwork.com/activity/p/4837/ Sat, 01 Apr 2023 23:41:53 +0000 0 84c5782c915ee2fb13da93fa4ee6833e mike became a registered member https://tubeampnetwork.com/activity/p/4836/ Sat, 01 Apr 2023 23:41:51 +0000 0 e78594b3e4365739b5fba2816944de40 Mark replied to the topic Voltages too high in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/voltages-too-high/#post-8531 Thu, 16 Feb 2023 17:03:18 +0000 Hi Brian.  I don’t recall.  I haven’t touch the amp in years.  I’ld have to get it back on the bench to find out.  All I know is it’s working fine, though the overdrive isn’t as saturated and smooth as I would like.  My bench is in total disarray right now, so I’m not sure when I’ll be able to get it back on the bench to test it.

]]> 0 669b3a191940350d1c8b3b5b9cb25afe Brian replied to the topic Voltages too high in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/voltages-too-high/#post-8530 Thu, 16 Feb 2023 14:33:09 +0000 Hey Mark…. Did you ever figure this out? I’ve got the exact same issue going on with deluxe reverb reissue. Except on the rectifier I’m getting more like 7v on P2 and like 1v on P8. And my DC on P8 is even higher than yours.

I’m wanting to think that it’s an issue with xfmr yellow wires but I don’t understand how it can raise the DC voltage so…[Read more]

]]> 0 3526e9a99125b8299d0845c62a4c0a9a Brian became a registered member https://tubeampnetwork.com/activity/p/4831/ Thu, 16 Feb 2023 14:02:57 +0000 0 cdd75f3fa6270825d8e90ebe4577619d Robin replied to the topic Does 290AX need an artificial center tap? in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/does-290ax-need-an-artificial-center-tap/#post-8525 Sat, 07 Jan 2023 18:15:54 +0000 You can use the 6.3v center tap (green & yellow) to ground OR the 2-100 ohm resistors as an artificial center tap, but not both.   Good luck, enjoy.

]]> 0 6c5d9c9b7c0627bc973d3e56f9cadd74 Joe became a registered member https://tubeampnetwork.com/activity/p/4829/ Tue, 20 Dec 2022 18:57:50 +0000 0 df5bf926e4b9d4286702106c0ecc673f type_o_neg became a registered member https://tubeampnetwork.com/activity/p/4828/ Sun, 20 Nov 2022 20:34:55 +0000 0 139390d2330bf431721a2a716e40877c Bruce became a registered member https://tubeampnetwork.com/activity/p/4826/ Sun, 09 Oct 2022 14:50:29 +0000 0 05a4a9f8d89735627025e4632d6d4ada Paul became a registered member https://tubeampnetwork.com/activity/p/4825/ Tue, 04 Oct 2022 12:50:02 +0000 0 1473c1a90609004cab4d2beff63f5831 Robert became a registered member https://tubeampnetwork.com/activity/p/4823/ Wed, 28 Sep 2022 02:16:13 +0000 0 9aca118315580738b449fff93ceaedf9 billy_lamb became a registered member https://tubeampnetwork.com/activity/p/4821/ Sat, 24 Sep 2022 20:48:58 +0000 0 651effe3b5cef3e3973ec051099a8b81 Andy replied to the topic Hardware in the forum Amplifier Design and Construction https://tubeampnetwork.com/forums/topic/hardware/#post-8516 Wed, 24 Aug 2022 12:00:06 +0000 There isnt a list of hardware yet, but I plan a build in the next couple of weeks with my son so I can document it. Most folks use the Unibit or a stepped bit to drill the hole for the Impedance Switch in the back. You can do the same for the second 1/4″ jack if you want, but I tend to leave just the one and then wire the speakers to each other…[Read more]

]]> 0 de4bd852ca6ddbbf2c67019bdd4ff687 Greg Begin became a registered member https://tubeampnetwork.com/activity/p/4816/ Wed, 24 Aug 2022 10:17:56 +0000 0 c1f3a0787d68e07ddefb824eca251507 Wm started the topic Hardware in the forum Amplifier Design and Construction https://tubeampnetwork.com/forums/topic/hardware/ Sun, 14 Aug 2022 18:54:23 +0000 Is there a list of the hardware needed to complete this project.  I only got as far as the mounting bolts for the circuit board. I’d like to go to a hardware store and pick up everything I need. Also I’d like to find  more detail about drilling the extra holes in the chasses and where to mount the output transformer.

]]> 0 f02c2f4a1f6a11cfa3a45b2bcb73cea6 Donna94203 became a registered member https://tubeampnetwork.com/activity/p/4814/ Wed, 18 May 2022 20:12:21 +0000 0 82ae1ba04655dd15e0eb9d6031ee343e David became a registered member https://tubeampnetwork.com/activity/p/4813/ Thu, 31 Mar 2022 21:12:19 +0000 0 fc2027dc7071dc78a8db4266dda96e11 Wes became a registered member https://tubeampnetwork.com/activity/p/4811/ Wed, 02 Mar 2022 10:27:13 +0000 0 5fc09a8e0c8a0c9aa1f609a297f89bb0 Reid became a registered member https://tubeampnetwork.com/activity/p/4808/ Tue, 25 Jan 2022 15:54:04 +0000 0 d9d09492f1f2a9fb15bd3758b9d3434b Charl replied to the topic Does 290AX need an artificial center tap? in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/does-290ax-need-an-artificial-center-tap/#post-8493 Tue, 04 Jan 2022 17:23:50 +0000 Great!  Thanks!

]]> 0 87a09e7d53e7ce1d056bada481922599 Andy replied to the topic New Guy with Capacitor Question in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/new-guy-with-capacitor-question/#post-8492 Tue, 04 Jan 2022 15:37:46 +0000 Hey Kirk,

I think we answered this on email but I’ll add it here in case others have questions too. The Voltage rating of the capacitor can be higher with no issue but NOT lower. So the 475V is just fine.

Basically its saying that the voltage through it can’t exceed that number. So in a power supply section, they need to be much higher than in…[Read more]

]]> 0 3df4f5cd0878fa9de177a5cc6fb6d180 Andy replied to the topic Does 290AX need an artificial center tap? in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/does-290ax-need-an-artificial-center-tap/#post-8491 Tue, 04 Jan 2022 15:34:33 +0000 Nope! It has the green and yellow wire so it does not need the artificial center tap.

The available transformers are jumping around a lot and some manufacturers have the center tap and some don’t. With the 290AX, you do it just like the book says. No need to make an artificial tap.

]]> 0 66cdd03c421c528f20871fd17e56d5cb Thomas became a registered member https://tubeampnetwork.com/activity/p/4803/ Tue, 04 Jan 2022 15:32:13 +0000 0 68d9f25623da9121c63f7b211e9c3e22 Charl started the topic Does 290AX need an artificial center tap? in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/does-290ax-need-an-artificial-center-tap/ Sun, 02 Jan 2022 22:13:05 +0000 The paperwork that came with my Two-Stroke Kit purchased from the Tube Amp Network includes notes stating I would need to install an artificial center tap for my power transformer by attaching a 100 ohm filament from each green lead to ground.  However, the 290AX power transformer that came with my kit has a green and yellow wire matching the one…[Read more]

]]> 0 5e09abd511d073e05b701620623f3d40 Kirk started the topic New Guy with Capacitor Question in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/new-guy-with-capacitor-question/ Sun, 26 Dec 2021 17:36:13 +0000 Just rec’d my two stroke kit. Its my first build, and am learning as I go. After checking all my components, I found that one of my electrolytic caps has higher voltage rating than spec’d on the paperwork; the 8uF/450 V cap is listed in ppwk, but I rec’d a 8uF/475 V cap. Is this higher voltage an issue?

Ive been reading Dave’s book, and watch…[Read more]

]]> 0 5860fd64479115939d8b94d01f6f76b4 Kirk's profile was updated https://tubeampnetwork.com/activity/p/4800/ Sun, 26 Dec 2021 17:17:57 +0000 0 2107dac5c06d8cc3aafb62275017fb34 Kirk changed their profile picture https://tubeampnetwork.com/activity/p/4799/ Sun, 26 Dec 2021 17:17:07 +0000 0 f527d89b4090b2ecfd873e5b9cca2f8d Wm became a registered member https://tubeampnetwork.com/activity/p/4796/ Thu, 23 Dec 2021 15:12:25 +0000 0 17555658b3e39ada93421e60cf06fb98 Kirk became a registered member https://tubeampnetwork.com/activity/p/4794/ Wed, 15 Dec 2021 04:09:56 +0000 0 790146e44d6a25c098a0a52cc4dab22f Village became a registered member https://tubeampnetwork.com/activity/p/4793/ Wed, 17 Nov 2021 10:16:08 +0000 0 46f0864659f448d81972163423319a9a Steve became a registered member https://tubeampnetwork.com/activity/p/4791/ Thu, 19 Aug 2021 18:30:25 +0000 0 b7e7f2a61b127887202103a190a19c31 David became a registered member https://tubeampnetwork.com/activity/p/4789/ Thu, 12 Aug 2021 03:57:54 +0000 0 3c6ada2b41364eb2284dd15ff4b49e12 Robin replied to the topic High(er) Voltage in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/higher-voltage/#post-8468 Fri, 06 Aug 2021 17:13:09 +0000 I have NOS 5Y3s that output 50 volts lower right out of the box compared to a new manufacture 5Y3 or a SS rectifier.     I put a 1/2 power attenuator in all my 2Stroke inspired builds these days and it works well, allowing you to dime the amp (for tone) and have an output of around 2 watts.  It’s still loud though  🙂

 

]]> 0 95b9c956b1626456ef25b018b319c3d6 Benjamin Barta became a registered member https://tubeampnetwork.com/activity/p/4786/ Wed, 26 May 2021 21:15:30 +0000 0