After speedball some problems

spitzer · 3933

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Offline Paul Birkeland

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Reply #15 on: September 12, 2013, 11:18:12 AM
Nah, that's just tube microphonics.  They aren't particularly predicatable, and not indicative of any associated issue.

Paul "PB" Birkeland

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Offline spitzer

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Reply #16 on: October 01, 2013, 10:24:58 AM
i was bussy a bit so i couldnt mess with it. my imbalance problem is going on. i changed front tube today but no change. t5 is 81 volt instead of 75v. it can be a problem? this problem is very annoying:( help please.


Offline Paul Birkeland

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Reply #17 on: October 01, 2013, 03:19:12 PM
81V is plenty close to 75V, that indicates proper operation.

Paul "PB" Birkeland

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Offline Grainger49

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Reply #18 on: October 02, 2013, 02:00:32 AM
Paul, just for clarification, with the Speedball are the same +/- 15% ranges applicable?


Offline spitzer

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Reply #19 on: October 02, 2013, 04:23:28 AM
as imbalance is same with all volume levels volume pot won't cause it. So what can cause this?


Offline Paul Birkeland

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Reply #20 on: October 02, 2013, 08:35:53 AM
There is some variation in this voltage, as is mentioned in the manual.  This voltage will rarely be exactly 75V. This is normal.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline spitzer

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Reply #21 on: October 03, 2013, 08:07:34 AM
yesssss, finally i found the problem:) i have used a 239 ohm resistor which is normally on small boards on big pcb board. replaced them and everything is okey. :)


Offline Grainger49

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Reply #22 on: October 03, 2013, 08:16:26 AM
Even as long as I have been building, I measure resistances before I place/solder them. 

It is just a good idea.  Sometimes Blue looks like the Violet in the color codes.


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