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FDP Forum / Amp Mods, Repairs, and Projects / Kustom HV30

TonyMan
Contributing Member
*********

Lisle, IL USA

That's what she said!
Sep 22nd, 2018 08:49 PM   Edit   Profile  

I just picked up a used one and have a couple of needs:

1. Any sources for a new carrying strap? The rubber or whatever is gone and so I have metal handle that could get a little touch.

2. Any ideas on where I can find a downloadable manual? It seems manualslib.com has it, but I don't see how it can be downloaded.

Thanks

TonyMan
Contributing Member
*********

Lisle, IL USA

That's what she said!
Sep 23rd, 2018 08:20 AM   Edit   Profile  

Well, I did find many straps that will fit on eBay. I could still use some help in finding a manual..

Cal-Woody

USA/California

Why do I keep fixing things that work?
Sep 23rd, 2018 10:02 AM   Edit   Profile  

Do a Google search for your manual and they come up. You can also go to Kustom's website and get contact info for whatever you need.
It appears that they are based in Cincinnati, Ohio.
I looked at some of the photos shown and it stated that it was a hybrid tube/SS type of amp.
Might be interesting to hear. Enjoy.

External link

Leftee
Contributing Member
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VA

Sep 23rd, 2018 10:31 AM   Edit   Profile  

I remember when these came out. IIRC they run the preamp tube at high voltage. They seemed like a good offering, but they didn’t stay in the market long.

Peegoo
Contributing Member
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Tiki torches

at twilight
Sep 23rd, 2018 11:42 AM   Edit   Profile  

Generally, when I have an amp in for repairs and the overall condition is good but the handle is trashed, it usually means the handle was cheaply made.

I'll try to convince the owner to allow me to stick a better handle on it, unless it's a collectable or particularly valuable amp, of course.


Here's the manual (downloadable PDF)

TonyMan
Contributing Member
*********

Lisle, IL USA

That's what she said!
Sep 26th, 2018 09:28 PM   Edit   Profile  

Thanks all. I did see that manual at manualslib.com, but got a tad confused with the other buttons they had there. I also got a copy from Kustom. They also gave me a schematic!

I have a handle on order, not sure how good it is, but anything is better than a strip of metal for something that heavy. i got some Deox and cleaned the pots, however I have one still a little scratchy. This does not look like a repair I ant to attempt right now, so I'm gonna just keep it fthe way it is now.

Thanks everyone for the help.


Peegoo
Contributing Member
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As old as the sun

with white teeth
Sep 26th, 2018 11:49 PM   Edit   Profile  

Vigorously work that pot back and forth for about five minutes (shoot it with Deoxit a few times as you work) and it should quiet down. These usually get noisy not from wear, but from lack of use. Same goes for guitar pots.

Bestest way to work the pot clean is to remove the knob (if it's on a knurled shaft), rest your finger against the side of the shaft, and use a pokey/jabby motion to spin the shaft through its full rotation about a hundred times. It will quiet down.

TonyMan
Contributing Member
**********

Lisle, IL USA

That's what she said!
Jan 17th, 2019 01:15 PM   Edit   Profile  

Well, I finally got around to a second cleaning. The two that were bad sound better now. However, a couple of them seem to be harder to turn and I noticed one has a bent shaft. I'm thinking of replacing these. I've been in contact with Kustom and they said they do not have a parts list, but sent a schematic. From that I can tell them which pots I need.

I was wondering if there are 3rd parties where I could buy the parts for less than what Kustom would want. I cannot upload a pic right now, but they are small pots that look like blue plastic housing. They have a metal piece holding them in place soldered to the circuit board and the three contacts are stiff metal that bends and attach to the circuit board. I've done some internet searching but have come up with nothing.

Leftee
Contributing Member
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VA

Toxic Humility
Jan 17th, 2019 06:25 PM   Edit   Profile  

You could try this place. I get Marshall parts from them but they seem to offer a lot of different parts.

External link

Peegoo
Contributing Member
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Just beyond Mars

there's a world of fools
Jan 17th, 2019 11:08 PM   Edit   Profile  

Mouser and DigiKey are great sources for amp parts like pots, jacks, sockets, caps, resistors, etc.

You could also try sponsor Amplified Parts/AES, above.

TonyMan
Contributing Member
**********

Lisle, IL USA

That's what she said!
Jan 18th, 2019 04:36 PM   Edit   Profile  

Thanks folks, since they ar predicting 5 - 10 inches of snow overnight it looks like I will have plenty of time tomorrow to research, starting with the sponsor.

TonyMan
Contributing Member
**********

Lisle, IL USA

That's what she said!
Feb 11th, 2019 06:16 PM   Edit   Profile  

Just thought I'd update and basically close this thread. No one really had the pots I needed so I wound up ordering them from Kustom. I'm taking it slow, have removed the old pots and now am cleaning the solder out of the holes, hopefully mounting the new ones in a day or two.

Strange thing I missed is that each pot actually has 4 leads. I checked the schematic and they show up there as 3 connectors. Just to please my curiosity, I need to take an ohm meter to one and see what the fourth lead is.

Anyway, thanks for the ideas on where to look for the pots.

Leftee
Contributing Member
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VA

Toxic Humility
Feb 11th, 2019 06:59 PM   Edit   Profile  

Good deal! Keep us posted.

Peegoo
Contributing Member
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Just beyond Mars

there's a world of fools
Feb 11th, 2019 08:14 PM   Edit   Profile  

Is the 4th pot connection on the schematic the metallic pot case ground? Generally they are grounded for shielding considerations.

Interesting that they'd include that on the schematic--unless they're mounted to a non-conductive face plate on the chassis.

TonyMan
Contributing Member
**********

Lisle, IL USA

That's what she said!
Feb 12th, 2019 08:16 AM   Edit   Profile  

I worded it incorrectly, the fourth lug is not on the schematic. I checked it with an ohm meter and it connects to nothing, not even the metal taps that encase the pots. A check of the PC board shows that lug doesn’t connect to anything. The only idea I have is they decided to go with a proprietary design for these pots.

Peegoo
Contributing Member
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Just beyond Mars

there's a world of fools
Feb 12th, 2019 08:25 AM   Edit   Profile  

Ohhh okay.

TonyMan
Contributing Member
**********

Lisle, IL USA

That's what she said!
Feb 15th, 2019 10:00 AM   Edit   Profile  

Finished it last night! I actually replaced all the pots. Everything is working fine and no smell of component burn anywhere, lol.

Now to get the parts for a DIY footswitch.......

Leftee
Contributing Member
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VA

Toxic Humility
Feb 15th, 2019 11:14 AM   Edit   Profile  

Excellent!

FDP Forum / Amp Mods, Repairs, and Projects / Kustom HV30




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