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: 3 Guest(s)
[-]
Recent Posts
PT-6 finished!!
Actually the Loctal tube series, with number beginning with "14" are 12.6 volt tubes, at 150 ma, I'm not sure ...Arran — 02:14 AM
philco predicta
The model is the holiday without UHF It has no sound and I don't have an oscilloscope or signal generator.cgl18 — 08:51 PM
Philco model 38 code 121 not receiving signal.
I will definitely check my lead length and wire dressing. Thanks for the ideas.Stormlord5500 — 08:06 PM
Philco model 38 code 121 not receiving signal.
Do make sure that you twist the 3 wires from the chassis to the transformer, and dress away from tubes, especially audio...MrFixr55 — 07:38 PM
Philco model 38 code 121 not receiving signal.
The cone unfortunately got damaged when I removed it. The glue that held the cone to the basket was sloppily applied and...Stormlord5500 — 07:12 PM
Philco model 38 code 121 not receiving signal.
So what was wrong with the original speaker? Was the cone damaged? Unless it's totally hopeless I would put it aside as ...Arran — 05:31 PM
My collection presentation
There is an article on my site that introduces the first portable radios in my collection. I have only provided a link t...Vlad95 — 01:17 PM
Electrolytic restuffing/internals
Bridkarl This specific cap you have is the easiset type to restuff. I usually cut it at the upper border of the depr...morzh — 11:35 AM
philco predicta
Hi CGL18, First off, welcome to the Philco Phorum. I have not worked on a TV for a while but here are some givens: ...MrFixr55 — 08:22 AM
Another amp build - here I go again!
Sweet! I actually have a Dynaco Mark 4 that I had been running with 6L6s with no mods. Seemed to my 14-year-old head a...MrFixr55 — 12:57 AM

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

>