ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

previous: Jason Borders Forgive me if this is the hundredth... -- 1/22/2000 4:56 AM

Re: Matchless Spitfire

1/24/2000 10:04 PM
Benjamin Fargen	Re: Matchless Spitfire Jason, These are the choices I remember from the many helpful posts that Doc had made regarding his knowledge of the spitfire. I believe the Matchless OT primary impedance was something like 5200-5600 ct?? These are the 2 choices from Hammond if you want the closest OT specs: Hammond OT 1645 5000ct Hammond OT 1650H 6600ct Hammond PT 270FX (150ma) Hammond PT 270HX (200ma) Keep in mind you may have to use the Zener trick on those PT's to bring the plate voltages down to a friendly level for your EL-84's IMHO........I would draw up a different design for the tone stack. I think it sounds way to harsh and a tre/bass configuration will tame it down a bit. have fun. Benjamin.

1/24/2000 10:04 PM

Benjamin Fargen

Re: Matchless Spitfire

Jason,

These are the choices I remember from the many helpful posts that Doc had made regarding his knowledge of the spitfire. I believe the Matchless OT primary impedance was something like 5200-5600 ct??

These are the 2 choices from Hammond if you want the closest
OT specs:

Hammond OT 1645 5000ct
Hammond OT 1650H 6600ct

Hammond PT 270FX (150ma)
Hammond PT 270HX (200ma)

Keep in mind you may have to use the Zener trick on those PT's to bring the plate voltages down to a friendly level for your EL-84's
IMHO........I would draw up a different design for the tone stack.
I think it sounds way to harsh and a tre/bass configuration will tame it down a bit.

have fun.
Benjamin.

Replies:

Carlo q{I believe the Matchless OT primar... -- 1/24/2000 10:14 PM
DCH Appropriate for Lightning (3x12AX7) type? -- 1/26/2000 1:24 PM