Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: DummyLoad on January 09, 2019, 11:30:33 am

Title: yet another not a guitar amp.
Post by: DummyLoad on January 09, 2019, 11:30:33 am

finished this one last night. KT88/6550 with edcor iron. 400V B+ to plates running in UL mode. ownder had a new pair of 1960's USA tung-sol 6550 and sylvania 6SN7. we ran it up with load resistors and tested with a signal gen and o-scope.


pics: https://www.dropbox.com/sh/uwlfhkx95nveylm/AADQ_oOvLqw7gyNFgEPYJEaXa?dl=0


--pete

Title: Re: yet another not a guitar amp.
Post by: shooter on January 09, 2019, 11:49:25 am

NICE!  I like how there's more iron than tube  :icon_biggrin:

did you run siggen across the spectrum or just check clean/amplitude?

Title: Re: yet another not a guitar amp.
Post by: DummyLoad on January 09, 2019, 01:35:09 pm

thanks!


just basic. 60hz & 1khz tests. tomorrow night we use dist. analyzer and sweep freq.


--pete

Title: Re: yet another not a guitar amp.
Post by: jjasilli on January 09, 2019, 05:35:04 pm

Nice & clean, straightforward build!  Hope all checks out as expected.

Title: Re: yet another not a guitar amp.
Post by: p2pAmps on January 10, 2019, 08:52:42 am

Quote from: DummyLoad on January 09, 2019, 11:30:33 am

finished this one last night. KT88/6550 with edcor iron. 400V B+ to plates running in UL mode. ownder had a new pair of 1960's USA tung-sol 6550 and sylvania 6SN7. we ran it up with load resistors and tested with a signal gen and o-scope.


pics: https://www.dropbox.com/sh/uwlfhkx95nveylm/AADQ_oOvLqw7gyNFgEPYJEaXa?dl=0


--pete

A man after my own heart Pete!  Nice work

Title: Re: yet another not a guitar amp.
Post by: DummyLoad on January 10, 2019, 10:53:10 am

thanks for the kind words guys!


--pete