Hiwatt Custom 50 Mystery Mod

HIWATT amps from the Hylight Electronics era

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Mindride
Posts: 2
Joined: Fri Mar 29, 2019 1:35 am

Hiwatt Custom 50 Mystery Mod

Post by Mindride »

Hello All,
Newbie here with a question. I came across this Hiwatt 50 dated to 1980 with this crazy mod on the front panel. After a few hours scouring the web, i could not find anything about it...so here i am and i would like to thank anyone who helps me in advance :)

The mod is a selector switch with 5 positions and as I turn the knob counter clockwise it increases the gain for both channels but brings the level down for the master. Im not sure how this is supposed to work...
I have included pictures of the chassis and mod in hopes that someone here can identify it. Maybe tell me who did it? Looks like it was done factory...
Thank you!
David
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mhuss
Site Admin
Posts: 1440
Joined: Thu Nov 15, 2007 5:40 am

Re: Hiwatt Custom 50 Mystery Mod

Post by mhuss »

Well, that's definitely not factory (although neatly done). Interesting paint-covered circuit board in the middle. It looks like "Glyptol," an old insulating paint/covering used in the middle 70s.
Mindride
Posts: 2
Joined: Fri Mar 29, 2019 1:35 am

Re: Hiwatt Custom 50 Mystery Mod

Post by Mindride »

Thanks!
Yeah... i didnt want to take the red stuff off until i had some eyes on it. If i cant get any answers here i will take it to my amp guy and ask him to decipher it for me. It looks like some kind of slave for the master volume...
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