Links to Kustom schematics

[nosaj]

Actually, http://music-electronics-forum.com/a...1-dscf2813.jpg sounded the most promising.

First get the right board number then once you've got that you can goto the site I posted use Skitch to cut it then print it out.

nosaj

[nosaj]

First get the right board number then once you've got that you can goto the site I posted use Skitch to cut it then print it out.

nosaj

http://music-electronics-forum.com/t15744/

[sjfloat]

http://music-electronics-forum.com/t15744/

5065, the power amp board is the *one* schematic I already have. I scanned it myself from a hardcopy I was able to get back in the late 80s or early 90s.

I *greatly* appreciate the effort on your part though.

I'll try to have a look at the amp tomorrow and get board numbers for the rest.

Thanks very much!

[RDC]

just a black screen.

[RDC]

I have a little Kustom Practice amp. It might be 10 years old. Its an HV30T tube preamp solid state power. There is also an HV30 they made that is probably the same insides in a different chassis but not certain of this. The treble control acts a bit like a reverse volume control. Could be a leaky cap bleeding the signal to ground. I need a schematic. The board inside it is marked B0038-21C and nothing like that is listed on the Kustom sites I have seen posted here. Anybody have one or know how I might find one?

[Jazz P Bass]

Have you tried to call them & ask?

Kustom Amplification
9615 Inter-Ocean Drive
Cincinnati, Ohio 45246
859-817-7100

[nosaj]

I have a little Kustom Practice amp. It might be 10 years old. Its an HV30T tube preamp solid state power. There is also an HV30 they made that is probably the same insides in a different chassis but not certain of this. The treble control acts a bit like a reverse volume control. Could be a leaky cap bleeding the signal to ground. I need a schematic. The board inside it is marked B0038-21C and nothing like that is listed on the Kustom sites I have seen posted here. Anybody have one or know how I might find one?

Or you could test the cap to rule out your suspicion. Just follow the treble control till you find a cap. Even with a schematic you'd till have to follow a trace as not all schematics come with a layout. But best bet call Kustom as suggested.

nosaj

[vintagekiki]

Kustom Tube 12A

http://sindor.sweb.cz/Tube12A.pdf
Kustom Tube 12A Practice Amp

1)
https://usermanual.wiki/Document/Tube12A.443422305/

[Jazz P Bass]

The schematic supplied by VK may be helpful.

The most likely cause is C13, a 270 picofarad treble capacitor.
If it is faulty then you will see the treble control acting as a reverse volume control.
The capacitor may look like this:


Kustom Tube12A.pdf

Tube12A Tone Control.pdf

[Reader]

Transformer Schematic Symbol

The transformer primary winding, as shown on the referenced schematic, includes what looks like a resistor symbol at the top of the winding depiction. (Excerpt attached) Can anyone explain the meaning of that. I would not expect that they are indicating merely that the winding has resistance since all transformer windings always have resistance.

[g1]

Maybe their idea of the symbol for a themal fuse in the primary?

[Reader]

Maybe their idea of the symbol for a themal fuse in the primary?

Agreed. The presence of a thermal fuse would be a likely possibility but the schematic depiction is goofy. If it is a thermal fuse then maybe this is a case of a draftsman using whatever was available in the CAD SW library when generating the schematic. The schematic equivalent of changing the meaning of a word based on current slang usage?

[Jazz P Bass]

Yeah, I think the engineer got carried away with that one.

A simple 'squiggle' will suffice.

[vintagekiki]

Kustom Dual 30RC

https://music-electronics-forum.com/attachment.php?attachmentid=51695&d=1546095371

Thanks Dmeek

[vintagekiki]

Kustom Groove1200

https://music-electronics-forum.com/attachment.php?attachmentid=51696&d=1546095371

https://music-electronics-forum.com/attachment.php?attachmentid=51697&d=1546095371

Thanks Dmeek