[R-390] Below 8Mc

[Larry H]

Hi Chuck,  Do you have another rx with a signal level meter that will tune 17mc?    If yes, couple the 390A 1st mixer cathode(7) to its antenna through a 100k res and see if you get a signal.  If not, wiggle the crystal in its socket a little.  Or, check the output of the osc directly on its plate (you might want to add a small cap to the 100k res).  Also make sure mixer cathode circuit is in tact.  If not, wiggle J221 a lot.  And, check for voltage on osc screen.
Kind of difficult without a scope and sig gen.  Good luck.
Regards, Larry

      From: Chuck Collins <chuckcollins at prodigy.net>
 To: R-390 at mailman.qth.net 
 Sent: Tuesday, September 27, 2016 10:12 PM
 Subject: [R-390] Below 8Mc
   
Hello all.
Trying to get this 390a to work below 8 Mhz.
I had a bad cap across the 1st osc coil and replaced it with a mica. I 
had a disconnected wire to J-221, a bad 1st osc tube, two brown beauties 
that doubled in value, 2 open resistors and a broken tuning slug. I have 
3 volts across T207 when it is tuned.
Any other common part failures in this area? I cant believe there is 
more I have to fix here! Basically I only have a tube tester, a Simpson 
260 and a Fluke multi-meter. -Chuck
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