Yet another plexi 50 (head)

[archaos]

Whereas it formerly squealed (positive feedback instead of negative) like cutting open pig threat, it now roars. I just had to reversed the OT primary leads, & was done.
B+ 405V.
Voltages here : http://www.el34world.com/charts/valve/ValveData.php?e=view&f=14616

It has some KOC/Blencowe features :

  - full-wave rectified bias supply
  - external bias access with banana jacks & pots
  - independent bias controls for each tubes
  - hum-loop block network
  - heater elevation (divider from the HT, although I may have chosen the bias supply so as to use the negative elevation voltage instead)

[archaos]

...&

[archaos]

...& finally

[Backwoods Joe]

Good Job! Looks great. 

[archaos]

Thanks !

[Ritchie200]

Very nice!  I'm not sure if you know this but - as a requirement, if you post amp porn, you must also post sound.  Otherwise we will never talk to you again!

Jim

[archaos]

Thanks !

I'm not sure if you know this but - as a requirement, if you post amp porn, you must also post sound.  Otherwise we will never talk to you again!

Arghh...Hey, why not ?

[smackoj]

'Show and tell' around here means just that, show a little, play a lot!

 

[Backwoods Joe]

Was wondering what brand are the filter caps? All i can make out is "audio grade".

[archaos]

'Show and tell' around here means just that, show a little, play a lot!

 

Was wondering what brand are the filter caps?

Jensen & Evox Rifa filter caps actually.

All i can make out is "audio grade".

https://audio.jensencapacitors.com/products/capelyt/elytaxial/

[plexi50]

Beautiful work! Dont forget to invest in some ear plugs. Ive gone from (Save The Whales) to (Save Your Hearing). Too late for me. Just saying/

[archaos]

Thanks ! Thanks for the tip as well, unfortunately I believe it's the same thing for me = too late...