Tube Amp Network | Andrew | Activity https://tubeampnetwork.com/members/supermel/activity/ Activity feed for Andrew. Thu, 22 Oct 2026 13:39:20 +0000 https://buddypress.org/?v= en-US 30 hourly 2 be4023339168a128c98508c99809ac61 Andrew replied to the topic squeal when at high volumes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/squeal-when-at-high-volumes/#post-8345 Wed, 29 Apr 2020 15:30:21 +0000 I guess my video was too big so I posted it to youtube. Any ideas??
https://youtu.be/KgACmyqb7vI

]]> 0 2f134d711d9bd70eee68dc2d8860f6f0 Andrew replied to the topic squeal when at high volumes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/squeal-when-at-high-volumes/#post-8341 Wed, 29 Apr 2020 01:04:42 +0000 I’ve uploaded a video of what’s going on as well as a couple shots of the wiring. I have more if that’s helpful. As far as I can tell, I’ve wired this up right. I’m a bit concerned about the voltage but my PT doesn’t have any other wires to drop the voltage as the instructions allude to. I also do not have a different 5Y3 to try out. Any…[Read more]

]]> 0 92a4f57360f5f86f3ee411897d285c2c Andrew replied to the topic squeal when at high volumes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/squeal-when-at-high-volumes/#post-8135 Sun, 22 Dec 2019 05:45:51 +0000 One odd thing that is the impedance switch doesn’t seem to do anything. I’m getting continuity across all the leads to each other, regardless of the switch location. I also can’t notice any difference when it’s plugged in on my 8 ohm speakers except a tiny bit less hum at high volumes

]]> 0 24ea3951b06a839252cbf79232f904b2 Andrew replied to the topic squeal when at high volumes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/squeal-when-at-high-volumes/#post-8134 Sun, 22 Dec 2019 05:31:16 +0000 I checked and rechecked all the grounds and I’m pretty sure they’re all sound.

Voltages are looking off though. My voltage coming in from the wall is 123.6. Having measured all the voltages, I think I’m a bit high across the board too, possibly because of this input voltage? PT is putting out 6.8V (vs 6.3). 12AX7 pin1=153.5, pin6=153.3.…[Read more]

]]> 0 b2c0c681ec91aef4bb984b9d108175f5 Andrew replied to the topic squeal when at high volumes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/squeal-when-at-high-volumes/#post-8132 Sun, 15 Dec 2019 19:18:14 +0000 Resistors added. I can now get my volume up to 12, with its wonderful distortion, but at higher volumes the tone knob is now unusable. Anything above 0 on the tone with the volume even at 8 or so causes the sound to drop out and a slightly different squeal to happen. If I turn the volume to 5 or so, I can get more out of the tone but still not…[Read more]

]]> 0 a72111978503d03a58e1a8482f047c58 Andrew started the topic squeal when at high volumes in the forum 2 Stroke Amplifier Design and Building https://tubeampnetwork.com/forums/topic/squeal-when-at-high-volumes/ Sun, 15 Dec 2019 01:21:44 +0000 I recently built the 2 stroke, my first tube amp, from the kit that Andy pulled together! It sounds great but i’m getting an issue with what sounds like capacitors being overloaded and a ton of squeal when i turn the volume to around 10 (out of 12). Unplayable and I immediately have to turn back down. The only modification I made was to use a…[Read more]

]]> 0 13b4287352eb9237471ea6346e88c800 Andrew became a registered member https://tubeampnetwork.com/activity/p/4642/ Sun, 15 Dec 2019 01:06:11 +0000 0