Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: TIMBO on February 16, 2024, 08:34:25 pm

Title: 2144 60/30
Post by: TIMBO on February 16, 2024, 08:34:25 pm

Hey guys, Chassis with massive transformers has dusted off and a new direction from the original "BIG AMP" build from sometime ago.
I really like the 2144/EL84 sound and having FOUR BIG (see what I did there  :l2: ) gotta sound even better.
I'm not sure what the voltage doubler will put out, looking at approx. 60w, yeah I know "what a waste" but the 6l6GC were cheap and the chassis already had sockets.
A half power switch will be added for either Pentode/Triode or switching out two power valves.
15k grid stoppers should be 1.5k
(https://i.imgur.com/2nZMFXS.jpg?1)
(https://i.imgur.com/zJCfjl4.jpg?1)

Title: Re: 2144 60/30
Post by: glass54 on February 16, 2024, 09:06:10 pm

Hi Timbo

Quote

yeah I know "what a waste" but the 6l6GC were cheap

.
Do not be worried, you've got them and we're jealous!! :l2:
Looking forward to see the schematic and tested voltages of your Power Supply.
Kind regards
Mirek

Title: Re: 2144 60/30
Post by: shooter on February 17, 2024, 03:50:19 am

the Ausie speaker confused me  :icon_biggrin:
are you going from 6L6 to EL84?
I did a QSE of them, well used 6BQ5's, in an Audio build, still the best audio PA i've build.
measured 22W clean, didn't like to distort but it's SE not PP

Title: Re: 2144 60/30
Post by: TIMBO on February 17, 2024, 04:03:09 am

Hey shooter, This was the original build
BIG AMP (el34world.com) (https://el34world.com/Forum/index.php?topic=27147.0)