Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Alignment on a 38-12
#1
Tongue 

Hi everyone ! Hope all are well today. I recently recapped capped a 38-12 , tested and checked tubes and resistors. It was dead when I got it. It fired up but I could only get one station in (620). So I didi an alignment but still the same. Thank you for your help .

David
#2

Might want to take a close look at the tuner, looking for a bent blade or trash between the blades. Please be careful blades can easily damaged guess how I know that one. David
#3

Hi DavidH, welcome to the Phorum!  Sounds like you've checked all the obvious things but there are some experienced folks who may chime in.
#4

Never worked on a 38-12 just tossing this out. Did you check the coils for any opens?
#5

Also, in my 38-15, which is the same radio with a SW scale, the first tube is 6A7 and it is often enough acts funny when getting old. Mine decided not to work on half the SW scale. And not it is only the oscillator but also the RF amp, so if it is weak (and they are more often than not have very weak triode section while the generator section is fine) the sensitivity goes.

Plus what others said.




Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Zenith H725
IF2 will need replacement caps. The arcing was severe enough that the mica is pitted and holed where the HT flashed over...EdHolland — 04:04 PM
My Philco 37-116 Restore
Measuring from center tap like the tube voltages show. Cap 127 is isolated from ground. Cap 127 shown in upper left of p...dconant — 08:05 AM
My Philco 37-116 Restore
Are you measuring relative to the centertap or the GND?morzh — 11:57 PM
Philco 610B oscillator wiring
Still not clear on the wiring interface between the 6A7 and oscillator. After refering to the available schematics and s...Tubester — 07:18 PM
Refinishing Ideas
My 37-116 code 121 is the best sounding radio i have...a daily driver. Since we are talking about "changes". ...poulsbobill — 07:18 PM
My Philco 37-116 Restore
Hello, I finally got brave enough to take the cans off the Expander Unit. Got the grid cap wires replaced and back toget...dconant — 06:50 PM
Zenith H725
I got into the first AM IF can today, and found its mica was cracked. Amazing that it was still working. This one makes ...EdHolland — 06:10 PM
Philco model #20
AHH HA , I got it and can’t thank you fellows enough , when I changed the capacitors I took the advice and did not unsol...onlyrick — 02:24 PM
Zenith H725
Hello Ed, yes, I like letting projects run for few days to make sure they don't start acting up . Sincerely Richardradiorich — 01:03 PM
Philco 46-480 Electronic Restoration
I am almost finished with this restoration. All which remains is the power transformer. I cleaned it up some time ago, b...jrblasde — 12:41 PM

[-]
Who's Online
There are currently no members online.

>