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London Power's "PA"-series Tube Power Amplifier Kits
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Posts: 1
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Joined: Jul 2021
Location: United States
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07-06-2021, 04:19 PM
(This post was last modified: 07-06-2021, 04:21 PM by ironman28.)
(10-27-2018, 06:34 PM)I have a question about the PA66 power output stage.The resistors R18,R19 and R26, R27 150k 1W FP- are these required for proper operation or are they optional ?I am building the circuit using a standard output transformer not the toroidal type included with the kits. Wrote: Have you tried one of these? Post your questions or comments!
These octal, push-pull power amp kits use London Power's full-audio-bandwidth OT-10, OT-25 or OT-50 toroidal output transformers. Performance is so good they can be used for hi-fi. The power amp can be used with any of the common octal-based output tubes that use the standard pin-out. Tubes can be mixed as well!
Switching between fixed-bias and cathode-bias can be "global" (both tubes) or independent.
Lots more info at:
10W Power Amp Kit (PA66-10)
25W Power Amp Kit (PA66-25)
50W Power Amp (PA66-50)
![[Image: pa66-10-kit_800.jpg]](https://www.londonpower.com/image/data/pa66-10-kit_800.jpg)
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RE: London Power's "PA"-series Tube Power Amplifier Kits - by ironman28 - 07-06-2021, 04:19 PM
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London Power's "PA"-series Tube Power Amplifier Kits
