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

Model 80 Chassis/Tuner Isolation
#12

Hi Terry,

There's plenty of volume !!
I have installed new caps in the Bakelite case, a .015uF for #25 & and a .001uF for cap # 21.
Seem's I have just very weak reception.
When I hook up the RF signal generator to the antenna, set to a low level signal I have no issue receiving the signal at various frequencies.
For example, set the generator to 1300KC, change the tuner to 1300KC, or set the generator to 600KC, change the tuner to 600KC, no problem hearing the 400Hz tone. Looking on the scope at the speaker, it's a nice sine wave. And it's loud.
I changed R15 from 4M to 2M, it didn't help to bring in any stations, but it did make the radio even louder!

When I first started working on the radio I found the 6.45 ohm coil that is in series with C5 & R8 that connects to the cathode of the Det/ Osc open. I had found the wire from that coil was broken, so I found where it was open where it exited the coil and soldered it to the lug on the coil where the wire to cathode connects.
I replaced the incorrect 44 tube that was in the radio when I got it with a 36.

The only station that comes in is a country station from Carson City, but it has a lot of noise and is kinda garbled.
I just bought the AM transmitter kit from tubesandmore, when it comes, it will be interesting to see how well the radio picks up the signal from it.

This new hobby is getting expensive.
Just spent $80.00 on lacquer toner, sanding sealer, and semigloss clear for this cabinet. And some how I have ended up with 7 radios that all need to be refurbished. Including a Philco 14L.

Thanks for your help
Lewis


Messages In This Thread
Model 80 Chassis/Tuner Isolation - by Lewiss - 09-25-2018, 11:10 PM
RE: Model 80 Chassis/Tuner Isolation - by morzh - 09-26-2018, 08:07 AM
RE: Model 80 Chassis/Tuner Isolation - by Lewiss - 09-26-2018, 01:25 PM
RE: Model 80 Chassis/Tuner Isolation - by morzh - 09-26-2018, 01:33 PM
RE: Model 80 Chassis/Tuner Isolation - by Lewiss - 10-06-2018, 03:05 PM
RE: Model 80 Chassis/Tuner Isolation - by Lewiss - 10-07-2018, 05:10 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco Model 38-7: what caps & resistors do fail typically?
Since you stated earlier, you have a console 38-7XX.  They also had a 38-7T (table), and 38-7CS (chairside).  A very nic...GarySP — 01:18 PM
Part numbers to model cross
That I wouldn't know, but sometimes the radio document itself shows one, same as the capacitor cans' etc pinouts.morzh — 12:46 PM
Part numbers to model cross
Thank you morzh, that is exactly what I was looking for. Now , is there some where that shows pinouts for Philco power ...Jim Dutridge — 11:37 AM
Restoration of the Canadian General Electric A-87
Thanks for your help Michael. In fact, this video is only an intermediate result. Later I had to apply another tinting l...RadioSvit — 09:01 AM
Restoration of the Canadian General Electric A-87
Great job on the cabinet. PS. In the US notation, "kenotron" refers to specific type of tubes; we call re...morzh — 08:24 AM
Part numbers to model cross
This document has at least some tables of models and parts used. Example: Choke 32-7572, used in 604 radio. Search f...morzh — 08:19 AM
Restoration of the Canadian General Electric A-87
I also checked all the radio tubes on my Hickok 530 tube tester. The 5Z3 kenotron turned out to be faulty, all the other...RadioSvit — 08:02 AM
Restoration of the Canadian General Electric A-87
Well... While the varnish is drying up, I started repairing the chassis... Of course I started by replacing the pa...RadioSvit — 07:12 AM
Philco Model 38-7: what caps & resistors do fail typically?
Hello Martin, Welcome aboard our little community what great Model 38-7 Sincerely Richardradiorich — 12:30 AM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum Martin. I count about 9 paper caps, the 3 electrolytic caps and 2-Y2 safety caps to replace th...RodB — 09:44 PM

[-]
Who's Online
There are currently 1160 online users. [Complete List]
» 2 Member(s) | 1158 Guest(s)
AvatarAvatar

>