s reassembly
     Page 3 - Module Restoration
     Page 4 - Master Oscillator and FSK Keyer Restoration
     Page 5 - Back to Life

10/17/13 - 230vac - first power-on	Start checking out the interlocks and relays after wiring up the harnesses to the drawers.... 1) found/corrected my rewiring error in the tune-operate switch 2) the AM-CW HV relay was chattering - readjusted contacts & seems OK (whew - this sucker is really buried in the bottom) 3) brought up the bias/fil supply and adjusted the overload trip relays - found/corrected my rewiring error 4) brought up MV (600vdc & 1200vdc) supply to 1/2 voltage on a 115v variac, then full bore on 230 vac 5) couldn't get any AF in to speech amp - fixed a wire I had pulled loose on the 10-section mode switch - see below 6) hooked up TMC transmitting balun to convert FRT-17 600 ohm balanced output to 50 ohms coax to Bird dummy load 7) checked out the HV supply (up to 1kv) with the 115v variac
The 10-section mode switch way back inside there

It's alive!...alive! 11/24/13 - with help for my buddy K4OZY, we started to tune up in CW mode with full B+....
4-125 modulators	4-65 driver	4-400 final
TUNE mode - 250ma final cathode current	TUNE mode - 280 watts output	TUNE mode - B+ about 2.4 kv Screen voltage set to 640v per manual
OPERATE mode - 350 ma	OPERATE mode --about 600w output	OPERATE mode - B+ about 3.1 kv Screen voltage creeps up to 700-720v ...but I don't like that change - needs investigation

AM Troubleshooting - I see HV arcing on the scope at both pos & neg modulation peaks. Shows up on both modulator plates, modulated B+, and modulated RF. Fastest rise times appear on modulator plates. Can't get above 30% modulation or so before this happens. I have gradually tried to isolate it. > Listened - mod xfmr buzzes a little when arcing appears on scope. Is this a direct or secondary symptom? > Turned out the lights - can't see any blue glows anywhere. > Disconnected leads to shorting relay for CW operation - no change > Replaced modulator plate to mod xfmr wiring - no change. >Disconnected PA screen winding on mod xfmr - no change. >Disconnected PA plate/screen and connected 10K 300w resistive load to mod xfmr AHA - no arcing with B+ disconnected from load, but arcing returns if B+ is connected. >So I tried switching the mod xfmr secondary terminals (hypothesizing that there is arcing from one modulator plate winding to the nearest (modulated) end of the secondary) >And got no arcing! See scope photo . >So next move is to wire the PA, etc. back up and keep my fingers crossed.
Modulator drawer	temporary replacement modulator plate leads	substitute resistive load 10k/300w
Temporary mod xfmr connections	HV scope probe on resistive load	Oh yeah! - 1KV/division

And finally - with the PA hooked back up..... We Have AM!

12/20/2013 - My first (brief) QSO - on 3875 AM with Wayne WA1SSJ in New Hampshire
12/22/2013 - Checked into the Old Friends net (3715 AM) and worked a bunch of guys and after the net chatted with Todd KA1KAQ. Then I worked Chuck W3FJJ, this transmitter's original owner - the circle is complete after a year!!
- Chuck sent me a recording