Highly Regulated UTC LS-65 UL Amplifier

[ArcheusLedoux]

Read an article a while back.
https://www.worldradiohistory.com/Archive-All-Audio/Archive-Audio/50s/Audio-1956-May.pdf
And finally thought I'd build it with mostly UTC Iron.

 

[20to20]

Wheewww!! .... Now for the right channel.

 

[HollowState]

Okay, nice work. But I'm curious, why do I see a 6V6 and where's the 12AY7 input tube.

 

[Fuling]

Isn't the diode in the C- supply backwards?

 

[petertub]

The diodes in supply C makes the negative bias

 

[grovergardner]

..in which case, it is indeed drawn backwards. As are the caps.

 

[Robert H. Gribnau]

Okay, nice work. But I'm curious, why do I see a 6V6 and where's the 12AY7 input tube.

In addition to this:

Where is the 6SJ7? And where is the third voltage regulator tube?

 

[VaNarn]

The maximum cathode to heater voltage for the 6080 series regulator, is listed as 300 volts. To avoid tube failure the centre-tap of the heater winding should not be directly earthed. A capacitor should be fitted between the centre-tap and ground.