VintageKustom.com: Repairing Kustom Amps » New K200 owner, some guidance needed

New K200 owner, some guidance needed [message #25352]

Tue, 02 August 2016 16:14

penguinpaul
Messages: 7
Registered: August 2016
Location: UK

Junior Member

Hi All,
I've finally managed to get hold of a Tuck and Roll amp, so thought it was time to sign up here!

I've longed for one for quite some time (I tried to fill the void with a blue and then a red TR12L for a while), and recently found one. It's missing its badge on the rear unfortunately, but it has the "By Ross" printed on the front, and the output jacks stacked vertically behind the power cable, which seems to point towards being an A model. It has reverb too. It does have a fuse though, which seems to be a B thing - maybe someone added it?
The first two channels seem fairly normal sounding, but the second two sound very dark. I can't see anything in the way of caps on the input jacks.
The Tuck and Roll is in great condition, I'm really happy with it.

So now I'm ready to start tinkering inside. The reverb didn't work, and after measuring an open circuit on one side of the tank, I ordered a Mod replacement, which works fine.
This leads me on to my first question though - how should it be mounted? The old tank was cable tied to some holes in the top of the chassis. Should there be bars running across? I can't seem to find a picture of one with a reverb anywhere!

I'm about to do the 3 pin plug modification, but the only odd thing is that the pilot light negative appears to go to the chassis, via a resistor. Surely even in its current state with the death cap, this shouldn't work? But it does..

And finally, there is quite a hum - I'm not sure what level is regarded as "normal" for this amp. Looking inside, the large amount of white Mallory caps don't appear to match other images online of these, so I'm wondering if it has already had a recap at some stage in its life.
The hum and noise is post preamp - i.e, the volume controls don't make it better or worse.

Sorry for the long post, I'm trying to add pictures, but can't seem to find an attachments option. (And I can't use dropbox, as I can't post links yet)

Thanks in advance for any general advice anyone can give. Smile

Paul

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