Salvage an Amp III !!!

[skidshark]

don't laugh. found this at the freakin dump today! i've plugged it up and the tubes glow...that's as far as i've gotten!

 

[Spunky]

Excellent score Skids,

What were you doing at the dump? Lookin for guitar parts?

Now it's get dangerous with high voltage time.....LOL

 

[lagger]

David Bogen label leads me to think it is an old PA amp

 

[Spunky]

Yeah lagger,
and the single 6L6 says maybe 15 watts

 

[ess]

whoa! lemme sniff it


nice knobs too :idea: :idea: :idea:

 

[skidshark]

.....15 watts would be perfect! 8) 8)

the dumps are cool around here spunk! they let the guys who watch it sell stuff! i;ve actually been stopping by from time to time hoping to find something i could salvage a tube amp out of, hope this is it! if so i've got a cheesey little gorilla amp chassis to stuff it in! (sleeper?) 8) 8)

better not count my chickens yet....still smarting from the organ fiasco! :oops:

 

[Sgmaniac]

Nice! Dive a little deeper next time, you might find speaker cab to go with it!! 8)

 

[skidshark]

i certainly would if it got me what i was after SGM! i'm the scrounger from hell i tell ye!!

welp....as a first test i hooked a speaker up thru the existing plug, and the guitar into the phono jack....as it was warming up i got the guitar coming through the speaker, but then it started humming real loud, even after unplugging the guitar from the amp. almost a low pitched feedback sound.....hmmmmmm....

further inspection...the 6AU6 tube isn't glowing...

it still makes the noise even unplugged from the guitar and with the volume turned all the way down....

and i'm getting just a little spark when i touch the speaker wire to the output plug and move it around...

 

[Spunky]

The spark is a good sign. Not to worry.
The hum is the leaking caps. Gotta replace the big one near the transformer first then go to the next biggest one. The tube will start to glow and nirvana will set in.

Great find!

 

[skidshark]

i've been reading the article on a link you posted spunk....are those the filter caps they're talking about? thanks for the encouragement!

 

[Spunky]

Yeah,

the filter caps...yeah, that's it......Me and Morgan fairchild....er I mean...ahem!
The caps all start leaking voltage after a while. It the nature of the materials used. They break down after a while. need to get same spec replacements and you will be fine.
I have 2 POS amps on the way and am circling the cage like a hungry gerbil.....Waiting for Morgan Fairchild to walk thru the door.....yeah!

 

[ess]

one of them record player amps hum and scratch and scrunch like hell, maybe the cap is goosed on it.. ill try to find some replacements. :idea:

 

[skidshark]

there are several of these on ebay right now for next to nothing!
they're called bogen-challenger cha 10's...

i found some talk about them over on the plexi-palace board also:

http://www.vintageamps.com/PlexiPalaceUBBcgi/ultimatebb.cgi?ubb=get_topic;f=5;t=001486

 

[CharlieB]

Clean er up Ess.

The transformer is fairly clean. DO NOT SAND OR SCOUR IT.

Change the multielement capacitor (silver can).

Change those paper tubed capacitors.

Then enjoy it.

 

[skidshark]

CB...do i mail it parcel post or will he be sending someone round to pick it up? 8)

 

[Six String]

Neat find Skids. Doesn't look like too major a project. Good luck! 8)

 

[ess]

CB...do i mail it parcel post or will he be sending someone round to pick it up? 8)

 

[skidshark]

gotta cut CB some slack.....he must be multi-tasking again!!!

 

[ess]

is that "multi-tasking" or multi-tasking? :twisted: :twisted: :twisted: 8) 8) 8) 8)

 

[skidshark]

"......."!!!