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

Heath-Zenith (Heathkit) Frequency Counter Model SM-2420
#9

Also I think I may have figured out why my signal generator isn't working, I think my Philco 116B may have become "deaf" so to speak because its not picking up any signals whatsoever on any of its band settings using just a simple wire antenna hooked up to it, which I find very strange, its acting almost like maybe a tube or two in the Radio's Front End may have failed (whether it be the one of the Detector tubes or one of the IF tubes) and unfortunately I don't have any of the tubes that are needed for those positions in this radio, I tried swapping the 1st Detector tube with the 1st Audio tube (both are type 77 tubes) and there wasn't a change in the performance of the set. 
So that only means that either the 2nd Detector tube (37 tube) died or one of the IF tubes (78 tubes) must of failed or something is wrong with the RF stage (78 tube). 

Thankfully I do have several 78 tubes in my stash that I could test to see if the IF Stages may have died or see if the RF Stage died.


Messages In This Thread
RE: Heath-Zenith (Heathkit) Frequency Counter Model SM-2420 - by captainclock1988 - 05-06-2020, 01:25 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

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

>