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

Philco 39-30 Questions
#1

I have a 39-30  http://www.nostalgiaair.org/PagesByModel...013289.pdf

The pilot light is part 51 but it is it a 44 or 47 is there a way to tell what belongs?
My other question is on the ANT / GROUND terminal the ground is connected through a .02 cap before going to ground the print does not show this configuration, the print just shows it going to ground. What is correct?

Thanks   Eric
#2

Looking at this chart:


http://www.philcorepairbench.com/lamps.htm

It is a special frosted or painted bulb, but the specs of 6-8 volts at 250 ma also match those of a type 44 which is a bayonet base bulb too, so that should be a good sub. 

I don't see a .02 in the schematic for the ground either, does it look like a factory cap or something someone added later?

John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
#3

(03-18-2015, 10:14 AM)Eliot Ness Wrote:  Looking at this chart:


http://www.philcorepairbench.com/lamps.htm

It is a special frosted or painted bulb, but the specs of 6-8 volts at 250 ma also match those of a type 44 which is a bayonet base bulb too, so that should be a good sub. 

I don't see a .02 in the schematic for the ground either, does it look like a factory cap or something someone added later?

Already had replaced it as I was changing all paper caps it but I had cause to look at it when I checked the terminal with a meter and it showed high resistance then looked at it and saw the cap. This radio was missing an output xformer and the Bakelite condenser block 41 was also jumped out. So someone has messed with it.
#4

Went into vol. X and looked at other Philco's with a terminal for ground and not a one shows a cap there so I will remove it.

Eric
#5

(03-18-2015, 10:46 AM)Eric Wrote:  Went into vol. X and looked at other Philco's with a terminal for ground and not a one shows a cap there so I will remove it.

Yeah, I'd remove it too.  When you replace the two .01's that were #41 you want to use safety caps since they are going from line to ground.  I use X1/Y2 caps like those in the link, but I got mine at Mouser:

http://www.justradios.com/X1Y2capacitors.html

John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
#6

I use safety caps also got mine from Just Radio. Thanks
#7

That cap provides the RF ground to the chassis. You typically would see this on an AC/DC set. I would just connect the gnd post to the chassis. The bulb doesn't matter the 47 will lighten the load by 100ma. Where it is critical is on series strung heaters as all the current need to be equal.
Terry




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Model 70 Cabinet Trim
Hello musar, First all welcome to the forum and yes that is true that steve stopped making trim . Sincerely Richar...radiorich — 12:13 AM
Model 70 Cabinet Trim
I have recently come into possession of a Model 70.  The trim around the base needs to be replaced.  If this were years ...musar — 12:07 AM
philcorepairbench.com - shadow-meter
Anyone know of a way to recover these files from the repair bench? Thanks. fenbach — 11:16 PM
Philco model 38 code 121 not receiving signal.
That's true. Of course If I were to get a vtvm I'd probably have to sink money in to it to get it working right. Probabl...Stormlord5500 — 08:44 PM
Philco model 38 code 121 not receiving signal.
A DMM is good enough. One rarely has to measure indictance, but if you do, short of getting a serious LCR meter (I hav...morzh — 07:35 PM
Testing a speaker and output transformer Trutone A2-G
You guy's are right on. I found a broken wire on the speaker plug that I replaced and all is well now. Have better volu...murf — 03:43 PM
Philco model 38 code 121 not receiving signal.
I need to get a vtvm. I think that little component tester is just more accurate. Plus it shows the inductance which is ...Stormlord5500 — 03:07 PM
Philco model 38 code 121 not receiving signal.
I use a pair of Mastercraft brand DMMs from Canadian Tire, from what I read most of those DMMs use the same main chip re...Arran — 02:36 PM
Philco model 38 code 121 not receiving signal.
Thank you sir. Yes I feel good and also relieved because this one's been weighing on me a bit.Stormlord5500 — 11:18 AM
Philco model 38 code 121 not receiving signal.
It feels good don't it? Good luck on the rest.Paul Philco322 — 11:06 AM

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

>