Tweedle Dee build

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bepone
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Tweedle Dee build

Post by bepone »

Here is presented one build with great result, not so strictly following HADs tweaks of 5E3..

My friends build, with little bit help of me..

Build is around this pcb which i have made few years ago..pcb is accepting NFB to cathode of V2..

PT is DIY, OT is Piemme Elektra Italy, some Dralorics CF and SMA metal films here and there, Koa Speer 100k for anodes..First time used 22uF Bipolar caps for cathodes, like in Hi Fi, and Speaker crossovers :lol:
IMG-20230119-WA0012 (2).jpg
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bepone
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Re: Tweedle Dee build

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IMG-20230224-WA0002.jpg
IMG-20230224-WA0000.jpg
IMG-20230224-WA0001.jpg
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bepone
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Re: Tweedle Dee build

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IMG-20230413-WA0002 (2).jpg
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Re: Tweedle Dee build

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IMG-20230320-WA0014.jpg
IMG-20230417-WA0004.jpg
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bepone
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Re: Tweedle Dee build

Post by bepone »

box pics..
IMG-20230427-WA0013.jpg
IMG-20230508-WA0001 (2).jpg
IMG-20230516-WA0001 (2).jpg
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Re: Tweedle Dee build

Post by bepone »

some local find imitation of leather used for the cab.. PVA express glue , side per side, slow process, cable from the old headphones for piping..
IMG-20230522-WA0003.jpg
IMG-20230518-WA0001 (2).jpg
IMG-20230526-WA0002 (3).jpg
IMG-20230523-WA0003 (2).jpg
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bepone
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Re: Tweedle Dee build

Post by bepone »

now about the sound and tweaking tommorow..

here are clips from finished amp.. there is no tube rectifier, and added NFB, speakers are Jensen C12n, and Jensen Tornado Neodymium,
https://www.youtube.com/watch?v=YnjfHaAxRxE

https://www.youtube.com/watch?v=wMwlGUlDivM
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Mark
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Re: Tweedle Dee build

Post by Mark »

Where did you get the circuit board from?
Yours Sincerely

Mark Abbott
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bepone
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Re: Tweedle Dee build

Post by bepone »

i drew it acc to orig layout and made few pcs..
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Mark
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Re: Tweedle Dee build

Post by Mark »

Thanks for your reply, the PCB looks good. I thought it might have been the commercially available PCB’s.

https://www.aaelectronicspcb.com/
Yours Sincerely

Mark Abbott
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Re: Tweedle Dee build

Post by bepone »

only one remained but you are too far? :)
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bepone
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Re: Tweedle Dee build

Post by bepone »

few more pcs:
01_result.jpg
08_result.jpg
09_result.jpg
10_result.jpg
11_result.jpg
15_result.jpg
16_result.jpg
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bepone
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Re: Tweedle Dee build

Post by bepone »

last state after the tweaks:
07_result.jpg
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bepone
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Re: Tweedle Dee build

Post by bepone »

Mods/ drifted from HAD:

SS rectifier - with care that voltages are correct
Power tubes screen resistors 470R
Power tubes cathode - 300R
3P NFB switch
Pre PI Master volume (tried trainwreck MV but it was horrible)

Normal channel – coupling cap – 4,7nF

Cathode R - 2,7K
Anode R - 220K
Bypass cap - 0,68uF
Added HI /LO inputs

Bright channel – coupling cap 10nF

Grill vents are to be printed and installed soon
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Mattbedrock
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Re: Tweedle Dee build

Post by Mattbedrock »

Very nice work. Thanks for sharing.
Matt
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