[AMPS] Need info on my Alpha 77SX amp... What is Switch 10 do?

[bob alexander]

Chris Victor wrote:
> 
> Howdy fellow amp ops/builders....
> 
> I recently aquired a Alpha 77SX (converted back to a one tuber by
> previous owner) and it has this slide switch next to the CB-2 board that
> has a dymo label with the words NORMAL & BYPASS.
> 
> The footnote states that with sn 2750 and below switch S10 is used. With
> sn 2751 and above this switch is hardwired to 'QSK'.
> 
> Any body have a clue what this switch really does? I guess it was for
> xcvr's that didn't have QSK for CW/SSB??
> 
> Also included was a brand new (NOS) tank coil that upon further
> inspection, shows that the 10 meter coil is thicker than the 10mtr
> windings on the  coil thats in the circuit now. Maybe for better Q on
> the higher freq's?
> 
> The rig has the higher ufd cap, higher current diodes in the power
> supply, and the drop in Peter Dahl xfmr Style No.9 with the secondary at
> 1800/2800 VAC @ 1.2Amp CCS and the 5.0VAC 20amp winding as well the
> standard other windings.
> 
> This amp does need a new front panel as the way it is now is a poor
> re-paint job with un-even stenciling. Any pointers out there??
> 
> Chris WA6SUY
> "4-1000 amps are a true joy to watch"....
> 
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Howdy,
I believe that is the switch for either tuned input or untuned input.
Bob, W5AH

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