The next set of 801A drives 211 amplifiers shares exactly the same circuit with the already finished amps. But it will be in a different chassis in 'tower style'.
Everything will be mounted on metal plates, stacked above each other:
The top plate carries the two tubes and the signal transformers:
The bottom side of the top plate showing al the signal wiring:
The small transformer on the top left is the input transformer which is wired 1:4. This way the amp has a sensible input sensitivity with only two stages.
Handles and vertical mounting bolts added:
Capacitors and chokes are mounted on a sub assembly and pre wired:
The sub assembly added to the amp:
The amp ready for testing:
In the next part I will show the assembly of the power supply.
Best regards
Thomas
Hi Thomas,
ReplyDeleteVery clean build (again..) I like the minimalist look on top. For this build you use 1:4 input transformer ratio for the 801A. For your 45/45 amps do you use a higher ratio like 1:8? Thank you.
Hi Rick,
ReplyDeleteI select the step up ratio depending on the gain needed in the system in which the amp is
going to be used. I try to keep the step up ratios as low as possible
Thomas
Hi Thomas,
DeleteThanks for the reply. That was helpful info..
Regards