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Re: C795 Frankie [message #23115 is a reply to message #23067] Sat, 13 June 2015 23:37 Go to previous messageGo to next message
chicagobill
Messages: 2005
Registered: April 2003
Senior Member
Well Happy Birthday to Bud!

Pleat, I will take a photo of my head and try to post it here. When I was in Chanute for the reunion a few years back, I had photos of my amp that Bud signed for me. It was at that time I heard the story about the problems that Bud had with his partner and why they split up.

I know that the later service manuals clearly stated that all of the K200 amps used 16 ohm speakers and I know that most of them did have 16 ohm speakers, but I have seen 8 ohms in a some of the earlier cabs like mine. It's been a while since I had the back off of the cab, but as I recall mine does not have a center divider either. I know I've heard the story about the broken saber saw before, but did all of the cabinets have ports or did the earlier ones come without them?

Bud's note about the speaker oscillation must be referring to the A-series amps, or what he called the direct drive design.

So my personal feelings here are that these two cabinets are matched and original with the resistors for use with a Frankie head. Which by the way is a pretty dumb solution to the problem, as half the amp power is wasted by the resistors. This is the reason they went to the 16 ohm speakers. I would also assume that the owner probably used the amp at times with only one cabinet, which would reduce the power even more.
Re: C795 Frankie [message #23116 is a reply to message #23067] Sun, 14 June 2015 00:48 Go to previous messageGo to next message
bluezebra is currently offline  bluezebra
Messages: 89
Registered: February 2014
Location: Lafayette, LA
Member
WOW!!!
What a history lesson and from the man himself.
Of interest to me is the fact that many years ago I worked as police officer and used a Kustom radar (it even had tuck and roll covering)
not knowing it was related to the Kustom of many years ago....!

BTW...the head has six power transistors.
Now to bring it back to spec I would have to find four more speakers. Think I'll just put back the resistors...why mess with history?

Thanks pleat for the research.
Re: C795 Frankie [message #23117 is a reply to message #23067] Sun, 14 June 2015 06:17 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4733
Registered: June 2004
Location: NY
Senior Member
Yes your head has 6 TO3 type power transistors on the rear , but only 4 comprise the main output stage.
One is the driver for the output stage and the other is part of the voltage regulater for the preamp section.

Bill I your right about the wasted power that the resistor will soak up and I am not sure if in the end with two cabinets running ( 4-15") that you will still end up with more sound pressure level then just running 2-15s or just reach a break even point?
If it's just around the break even point then dragging around that second cabinet will just be for exercise and showi guess!
Re: C795 Frankie [message #23118 is a reply to message #23067] Sun, 14 June 2015 13:14 Go to previous messageGo to next message
bluezebra is currently offline  bluezebra
Messages: 89
Registered: February 2014
Location: Lafayette, LA
Member
Is there a schematic for this model? I don't see any listed on the site.

If what I'm reading is correct. The loudest this thing will ever get is the
way I have it now. With one cab running without the resistor in line.
Re: C795 Frankie [message #23119 is a reply to message #23067] Sun, 14 June 2015 15:31 Go to previous message
stevem is currently offline  stevem
Messages: 4733
Registered: June 2004
Location: NY
Senior Member
Yes it's under the K200A listing for some reason and it's the frist set of schematics that comes up and says K200 in the lower left.

If your cabinet is wired for 4 ohms then that may be the loudest it gets, but sound pressure can be a funny thing dependant on the room so trying it with both cabinets wired up with the resister my be worth a try also.
Too bad the cabinet has no ports as then you could wire up a reachable switch to just short across that resistor when you want!
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