Home » VintageKustom.com » Comment Board » K-250 Bass Head (Suprise Inside)
K-250 Bass Head [message #23218] Wed, 01 July 2015 23:51 Go to next message
oren hudson is currently offline  oren hudson
Messages: 274
Registered: March 2008
Location: Gastonia, NC
Senior Member
I've had this '71 Kustom 250 bass head for over a year. I've just now started on the rehab on it. When I opened it up, I saw a large sheet of paper just laying on top of the innards. I picked it up, turned it over. The original schematics! I've taken apart dozens of Kustom heads over the years, this is a first for finding the schematics inside. Very cool find.
Re: K-250 Bass Head [message #23219 is a reply to message #23218] Thu, 02 July 2015 01:20 Go to previous messageGo to next message
chicagobill
Messages: 2005
Registered: April 2003
Senior Member
Most if not all of the metal front amps had a copy of the schematic included inside. Normally it's glued to the top cover plate.
Re: K-250 Bass Head [message #23222 is a reply to message #23218] Thu, 02 July 2015 12:00 Go to previous messageGo to next message
Iowa Boy is currently offline  Iowa Boy
Messages: 767
Registered: June 2014
Senior Member
Yeah all three of my 250's had the schematic inside of them. To bad none of my 200's had them in them. Goes to show that the 250's didn't need as much maintenance to keep them running like the 200's. If you don't have to open them up you can't loose the schematic.
Re: K-250 Bass Head [message #23229 is a reply to message #23222] Thu, 02 July 2015 22:23 Go to previous messageGo to next message
oren hudson is currently offline  oren hudson
Messages: 274
Registered: March 2008
Location: Gastonia, NC
Senior Member
Yea, this one looks like it lost it's glue and drifted down on the ampworks. I can see the residue of glue where it was located.
Re: K-250 Bass Head [message #23238 is a reply to message #23218] Fri, 03 July 2015 06:49 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4728
Registered: June 2004
Location: NY
Senior Member
I sold a 250 last year that also had a mod list stuck to the schematic that stated that it had the gain mod done to it.
I have never seen that in all the other 250s and 150s I have worked on over the years!
Re: K-250 Bass Head [message #23242 is a reply to message #23238] Fri, 03 July 2015 10:24 Go to previous messageGo to next message
oren hudson is currently offline  oren hudson
Messages: 274
Registered: March 2008
Location: Gastonia, NC
Senior Member
Curious - what were the mods? Or too many to list.
Re: K-250 Bass Head [message #23243 is a reply to message #23218] Fri, 03 July 2015 10:43 Go to previous message
stevem is currently offline  stevem
Messages: 4728
Registered: June 2004
Location: NY
Senior Member
it's a mod for more gain on the preamp PC-5066 board that was issued in November of 71.
It involves 3 resistors and a cap, if your amp was made after this it has the mod done already and I have found that if you play a axe with active pickups your better off with out it, but to each his own!
Previous Topic: K-250-4 Amp Head
Next Topic: Foot Switch pedal for K-250-4
Goto Forum:
  


Current Time: Thu Mar #d 18:04:14 EDT 2024
.:: Contact :: Home ::.

Powered by: FUDforum 3.0.9.