Completed amp rebuilt as SE 26-45-300B

What people are working on at the moment
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RhythMick
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#1 Completed amp rebuilt as SE 26-45-300B

Post by RhythMick »

I'd been listening to a really nice amp while I rebuilt mine to the standard of my brother Geoff's. Art Audio Symphony with the WE OPT and improved chokes.

However I knew within a few seconds of switching mine on last night that it was in a different league. And quiet... That's a real result for me, no buzzes or hums, on very sensitive speakers (Lowther EX4 open baffle DIY build).

A few photos attached. 6 of Andrews DC boards placed centrally with the AC inputs to the amp centre line and the DC going out to the sides. Power is in the separate PSU mounted on sliding rails lower left in the hifi cupboard. Amp is lower right.

Balanced input transformers
26 SE @ 6mA, anode choke loaded with LL1667-05 (810H)
1.0uF Mundorf coupling cap
45 SE @ 28mA, anode choke loaded with LL1667-25
1.0uF coupling cap
300B SE @ 60mA, Tribute OPT

Can't wait to lug this beast to the next meet.
Attachments
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simon
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#2 Re: Completed amp rebuilt as SE 26-45-300B

Post by simon »

Can't wait to hear it, that's some serious investment in time and money.
RhythMick
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#3 Re: Completed amp rebuilt as SE 26-45-300B

Post by RhythMick »

Thanks Simon, yes lots of blood sweat and tears but also a fantastic learning experience. Really enjoyed it.
steve s
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#4 Re: Completed amp rebuilt as SE 26-45-300B

Post by steve s »

Looks great, right up my street too..
All good parts in the amp too. I'm impressed

Not sure when our next meet will be though ?
The tube manual is quite like a telephone book. The number of it perfect. It is useful to make it possible to speak with a girl. But we can't see her beautiful face from the telephone number
RhythMick
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#5 Re: Completed amp rebuilt as SE 26-45-300B

Post by RhythMick »

Oh and all valves are cathode biased
Cressy Snr
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#6 Re: Completed amp rebuilt as SE 26-45-300B

Post by Cressy Snr »

Fantastic! :D
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RhythMick
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#7 Re: Completed amp rebuilt as SE 26-45-300B

Post by RhythMick »

Cressy Snr wrote: Wed Feb 24, 2021 11:07 am Fantastic! :D
Why thank you sir...
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Ali Tait
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#8 Re: Completed amp rebuilt as SE 26-45-300B

Post by Ali Tait »

Very nice indeed!
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izzy wizzy
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#9 Re: Completed amp rebuilt as SE 26-45-300B

Post by izzy wizzy »

You have a unique build style which is great to see. Where did you get those turret tag boards?
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Ray P
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#10 Re: Completed amp rebuilt as SE 26-45-300B

Post by Ray P »

Juke Box Jury style - Hit!

Sorry, I couldn't resist!
RhythMick
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#11 Re: Completed amp rebuilt as SE 26-45-300B

Post by RhythMick »

izzy wizzy wrote: Wed Feb 24, 2021 5:39 pm You have a unique build style which is great to see. Where did you get those turret tag boards?
Thanks. My brother does the wood working while I do the circuits and wiring. These are the turret boards I used. I also bought sister turrets and anvil from ampmaker. A while ago I bought wider ones from China which were also very good, but I wanted to buy UK this time.

https://www.ebay.co.uk/itm/333734511647
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