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JTM45 bypass switch

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Offline danieleb

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JTM45 bypass switch
« am: 24.06.2018 00:07 »
Hi, I finished now my Jtm, wonderful sound, really cool components, but I have a question about the bypass, I think the resistor on the switch don't mute completely the amp, can I remove it? Ii's a mod? I don't find it in others scheme.

Thank you

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Offline danieleb

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Re: JTM45 bypass switch
« Antwort #1 am: 24.06.2018 08:45 »
R107 by tubetown scheme, the 47K resistor on standby switch.

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Offline Dirk

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Re: JTM45 bypass switch
« Antwort #2 am: 24.06.2018 15:40 »
Hi,

that is right. It is NOT a mute but a stand-by and the resistor in parallel to the switch is a protection for the rectifier tube (less stress for the rectifier tube when turning on the amp again). If you want a real mute, than you must remove the resistor.

Best regards, Dirk
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Offline danieleb

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Re: JTM45 bypass switch
« Antwort #3 am: 24.06.2018 16:44 »
Thank you Dirk, I have 2 1987 RI and this jtm45 is a very very cool amp!
Cheers

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Offline mceldi

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Re: JTM45 bypass switch
« Antwort #4 am: 24.06.2018 17:22 »
@Dirk: the German description of th JTM45 mentions this, but the English does not. Have a look at the English page, and you'll see what's wrong with it.

Cheers
 John

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Offline Dirk

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Re: JTM45 bypass switch
« Antwort #5 am: 24.06.2018 22:05 »
Wir werden uns der Sache annehmen  ;)

Gruß, Dirk
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