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: 1 Guest(s)
[-]
Recent Posts
Philco Model 80 Transformer resistance
Thanks for the quick reply! Hmm...well that's good, so what am I seeing that's 1042 ohms on the schematic for the pow...Mike L — 08:46 PM
Philco Model 80 Transformer resistance
The DC resistance of the primary is 8 to 9 Ohm.morzh — 07:54 PM
Philco Model 80 Transformer resistance
I have a feeling the primary winding on the power transformer is bad. My resistance reading on the primary side is 9 ohm...Mike L — 07:48 PM
Rusty Tuning Condenser
I would try Naval Jelly and use a soaked pipe cleaner to get it where it needs to go.RossH — 06:56 PM
38-10T chassis Restoration begins
Hello Dconant , they sold mica to use as a insulator between transistors and their heatsinks too. Rob I will remove th...radiorich — 02:52 PM
38-10T chassis Restoration begins
Thanks for the info guys. I always wondered why the use of mica. Now I know.dconant — 01:52 PM
38-10T chassis Restoration begins
Most common plastics have a dielectric constant in the 3-4 range whereas mica is around 6. This means that even if you w...Steve D — 01:46 PM
38-10T chassis Restoration begins
It is acceptable but not desirable. Plastic is not an approved cap dielectric, and even though a reasonably thick piece...morzh — 11:52 AM
38-10T chassis Restoration begins
I have a question about the mica sheets. I thought I saw somewhere on the Phorum where someone used thin plastic report ...dconant — 10:44 AM
38-10T chassis Restoration begins
Yes, you should carefully remove the mica sheets from the trimmers otherwise you risk trapping foreign material in the t...RodB — 10:34 AM

[-]
Who's Online
There are currently 3311 online users. [Complete List]
» 1 Member(s) | 3310 Guest(s)
Avatar

>