[sdiy] Need help about how to service an amp

cheater cheater cheater00social at gmail.com
Thu Apr 15 00:22:11 CEST 2021


Well done Jean! Just wanted to congratulate you on a good job.

On Wed, Apr 14, 2021 at 10:37 PM Jean Bender via Synth-diy
<synth-diy at synth-diy.org> wrote:
>
> Hi !
> Finally, it wasn't such a big fixing. After looking at the components and circuit board, i realised that one of the two filtering condos was cold soldered.
> Now it works !
> Thanks for your tricks and advices.
> Best
> J.
>
> Le lundi 5 avril 2021, Ingo Debus via Synth-diy <synth-diy at synth-diy.org> a écrit :
>>
>>
>> > Am 04.04.2021 um 20:28 schrieb cheater cheater via Synth-diy <synth-diy at synth-diy.org>:
>> >
>> >> What would be the best way to emulate the speaker load ? A resistor connected to the output ?
>> >
>> > This might be surprising but... the original speaker that's still in
>> > the cabinet.
>>
>> In my experience so far almost all transistor amps run fine without a load (not so with tube amps - never run those without a load). But to be sure that they really work you need to connect a load. It’s possible that they appear to work without a load but don’t as soon as a load is connected.
>>
>> Using a speaker as a load for an amp of unknown state is risky - if the amp is defective it could fry the speaker very quickly (been there, done that).
>>
>> Ingo
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>
>
>
> --
> Jean Bender
>
> Hak Lofi Record
>
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