Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: DummyLoad on December 05, 2014, 07:17:35 am

Title: OK this is deja-vu.
Post by: DummyLoad on December 05, 2014, 07:17:35 am

someone though of this before i. :-\

remember that amp - casino el camino...

http://el34world.com/Forum/index.php?topic=17584.msg178898#msg178898 (http://el34world.com/Forum/index.php?topic=17584.msg178898#msg178898)

http://el34world.com/charts/Schematics/files/kay/kay_820.pdf (http://el34world.com/charts/Schematics/files/kay/kay_820.pdf)

hmmm...

love the power source scheme for G2 of the 7199. :-) clever.

--pete




EDIT: yet another: http://el34world.com/charts/Schematics/files/kay/kay720.pdf (http://el34world.com/charts/Schematics/files/kay/kay720.pdf)

Title: Re: OK this is deja-vu.
Post by: kagliostro on December 05, 2014, 01:28:55 pm

There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy.  :grin:

 :thumbsup:

Franco

Title: Re: OK this is deja-vu.
Post by: PRR on December 05, 2014, 01:44:16 pm

> OK this is deja-vu

Again?? Again??

The 720 and 820 are identical circuits. Any difference must be speakers or covering.

Title: Re: OK this is deja-vu.
Post by: DummyLoad on December 05, 2014, 06:24:21 pm

Quote from: PRR on December 05, 2014, 01:44:16 pm

> OK this is deja-vu

Again?? Again??

The 720 and 820 are identical circuits. Any difference must be speakers or covering.

they are diff. model #'s so they're different! :-P


--pete

Title: Re: OK this is deja-vu.
Post by: PRR on December 06, 2014, 09:45:51 pm

> power source scheme for G2 of the 7199

Here's a fairly extreme example.

https://pdf.yt/d/IF5cidwbWyNkKO9Z  1.5MB PDF

Title: Re: OK this is deja-vu.
Post by: DummyLoad on December 06, 2014, 10:25:32 pm

cool. thanks for sharing that.

you think that it would make a decent stomp box for fuzz?

at least the chassis is still made - BOM states "Bud CU3006A or equiv."

http://www.budind.com/view/Small+Metal+Electronics+Enclosures/Miniboxes (http://www.budind.com/view/Small+Metal+Electronics+Enclosures/Miniboxes)

--pete

Title: Re: OK this is deja-vu.
Post by: PRR on December 10, 2014, 11:33:00 am

> stomp box

Seems large. (Note the power supply was separate.) And 6AQ5 at those conditions will output 2 or 3 Watts--- a lot for guitar-cord. And like why the Herzog was invented, sustained overdrive without a load will zap the OT.

Title: Re: OK this is deja-vu.
Post by: DummyLoad on December 10, 2014, 08:28:36 pm

And like why the Herzog was invented, sustained overdrive without a load will zap the OT.

i gathered that. respectfully, i was asking if weather or not you thought it would make an interesting overdrive effect. and yes, we'd need a similar arrangement to the herzog to tame output to plug into amp.

--pete