DIY Audio Projects Forum

Help needed with tube amp diagnosis
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Author:  tubetinkerer [ 12 Nov 2018, 17:18 ]
Post subject:  Help needed with tube amp diagnosis

hello everybody

I am new to the forum, and please forgive me if I have posted this in the wrong part of the forum.
Anyway recently I have converted (Ish) a fidelity tr5 twin track reel to reel to a guitar amp. I have replaced all the leaky caps etc, soldered in some input jacks, and it sounded great, no problems. then about a week later, when I played it, it sounded robotic like when I played the guitar, all the controls affected it (that being volume and tone). There was no noise or anything when I didn't strum the guitar. So I re soldered all the connections in the amp, cleaned the tube sockets and the tube pins. It still did the same thing, so I switched out the tubes and it didn't make a difference.

Could anyone help me fix this?

Author:  turk 182 [ 09 Apr 2019, 10:39 ]
Post subject:  Re: Help needed with tube amp diagnosis

if the R/P bias oscillator was not removed that could be where the sonic weirdness is coming from!?

i take it that mechanical components like the tape heads have been removed?

and eliminating or bypassing the R/P switching would also be in order...but that one looks like a chore...

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