Hello folks,
I am trying to refurbish an old FL-2277 B Sommerkamp .
Unfortunately chematic and manuel I dispose of is a FL-2100 Z.
The look is very similar, but they are not.
Some minor details on the chematic .
I have some questions:
a) What is the best version 2277B or 2100 Z?
b) FL2277 B ALC circuit, why do they pick up the HF sig on the grid of a 572B
instead of the cathode , or the common power input on the cathode ( filament )
? Or could this be a ham introduced error ?
c) The grid current limiter resistors 33 E 3 w . One of these resistors has
been modified by a 2 x 22 E serial comb. !!
d ) Is it a common practice to use one of the power suply bleeder resistors as
a voltage divider, -40V ( calculated value ) used in the grid bias circuit ?
My first impession, the wiring and construction of this Amp is not an example
of professional skill.....
Who shouts please.
Jos on4kj
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