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

37-116 different heater values
#1

While researching hi main volts and remedies,  i had tried putting 3,  10 watt, 30ohm  wire wound resistors in parallel in the line cord, I figured that my set uses 
1.15 amp   and trying to get a 10 volts drop i would use  about 11 watts...so i thought my approximately 3x safety factor was enough.

The resistors hit 300 degrees after 15 min... maybe within derated values but still.  Dang.  More research and i decided to try and make   a bucking transformer
out of a wall wart. It  brought my voltage to around 110 now.  Much less heat.

So to my problem, i have read using the heater voltage is a good guide of mains voltage to use.  I measured the 6j5g AVC tube originally and went from 7.0 to about 6.5 volts .  Much better until i started measuring random others and they are all about 5.8 volts now.  I put in a  nos  6j5g and the heater is the same  about .7
above the others.

Why is one higher than all the others?  I know there is a magnetic tuning transformer and maybe this is part of that, but the tubes around it the 6h6g and the 6k7g are also at the lower voltage.

Any ideas?

Thanks

Bill


Messages In This Thread
37-116 different heater values - by poulsbobill - 05-01-2022, 10:39 PM
RE: 37-116 different heater values - by Mondial - 05-01-2022, 11:56 PM
RE: 37-116 different heater values - by Mondial - 05-02-2022, 12:15 PM
RE: 37-116 different heater values - by Mondial - 05-02-2022, 02:25 PM
RE: 37-116 different heater values - by Mondial - 05-02-2022, 03:45 PM
RE: 37-116 different heater values - by morzh - 05-02-2022, 07:09 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
1949 Motorola 5A9M
This would be the second portable in the "other radios" forum where I have a similar one in my collection. I h...Arran — 12:41 AM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hi PittsburgTost. The record changer looks like a Garrard or BSR (Likely Garrard). The spindles just pull out and pu...MrFixr55 — 11:57 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hello PittsburghToast , Welcome aboard and it looks like gary may have something for you ! now if I dig through my se...radiorich — 11:35 PM
Model 80 Antenna Issue?
You are kind of on the right path. You can touch the grid cap of the Detector/Oscillator 36 tube. I'm expecting a respon...RodB — 08:48 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Welcome to the Phorum, PittsburghToast!  I found an old thread that my interest you regarding the quality and worth of P...GarySP — 08:48 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Welcome to the Phorum! :wave: We do not have anything on that unit in our digital library. There is a Sam's Photof...klondike98 — 08:47 PM
Model 80 Antenna Issue?
I’ve replaced all the caps and resistors and the radio is working but minimal volume unless I put my hand near the re...Hamilton — 08:24 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hi there! this is my first time posting. I recently picked up this Ford-Philco Console record player and radio at a yard...PittsburghToast — 07:28 PM
philco predicta
I found that where I have the 140v B+ there is 50v and the tuner receives 235v through the orange cablecgl18 — 04:14 PM
Philco 91 code 221
Chassis grounds thru rivets is another good place to look. Oh and the stator screws on the tuning cap where the leads at...Radioroslyn — 08:11 AM

[-]
Who's Online
There are currently 368 online users. [Complete List]
» 1 Member(s) | 367 Guest(s)
Avatar

>