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

Heathkit VTVM
#16

Fixed did?
#17

Warren I have a old radio shack Hatitachi(sp) VTVM from around 1968 which I purchased new. Ok I am getting old! When new would take around 15 minutes of warm up before you could trust the readings. Recap a few years ago check resistors still takes a good 15 minutes warm up. David
#18

Codefox .. No, its not fixed yet.. my work doesnt allow me much time to do these things, but hopefully I will try these things soon. I am also ordering new caps and resistors to recap it. I will let you know what I find soon.. Thanks for wondering.
#19

A lot of the resistors should be precision wire wound, not needing replacement.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#20

I would say your V2 is not conducting based on what you have described.

I would clean the pins of the socket V2. Make sure the pins 1,6 have connection to the D1 and R29, and C6

I would check D1 and all resistors common to both sides of the V2 : R23 - R30

If I found no problems I would insure the transformer is putting out 120VAC not connected to the circuit.

Then I would start looking at and around M1.
#21

Thanks for everyones suggestions.. I might not get to checking it until next week, i am oncall for my job this week but I will try the suggestions and let you all know what happens, thanks again.
#22

Whatever, it's nice to have an analog meter when doing alignments, as digital ones stutter, stutter, got it? Good mostly for relative values, but good enough for most work. Gosh, must have been 50 years ago when I built one, or was it an Eico. To quote, "I just can't recall."
#23

Old VTVM's are great for alignments, as they do not "stutter" while tuning. Otherwise, fine and when warmed up, pretty good for relative readings. Usually battery leaks and voied ohms readings, and leaks further to take out a few more components. So long as meter movement is still good, can be saved pretty easily in an afternoon for a few bucks. Best of luck.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
The thrill is gone again, thought I was close to being done with it. Well Friday it was receiving broadcast, Saturday mo...osanders0311 — 07:47 PM
Help with Supreme 599
Iam getting closer to fixing it. I bumped Up the tranny voltage to get 5v on the 80 tube. I gan get the needle to move ...daveone23 — 03:41 PM
Philco 42-345 Restoration/Repair
Hello RodB, Checking my previous post I realized you're the one with the 42-340. I replaced the string for the tuning...osanders0311 — 03:12 PM
5U4 vs 5Z4 tubes
I saw no evidence of anything going wrong. The transformer is fused already which is nice. Interestingly the 5z4 did...bridkarl — 02:37 PM
5U4 vs 5Z4 tubes
I doubt anything cooked in 30 seconds because of the oops! These are very similar tubes, and nothing but transformer re...GarySP — 02:30 PM
Restoration of the Canadian General Electric A-87
Paul Philco322.You will be keeping very busy, you may have to go back to work for a breakIcon_smile. Paul To rel...RadioSvit — 01:57 PM
5U4 vs 5Z4 tubes
I grabbed the wrong tube and put in a 5U4 tube instead of the 5Z4 - I just had the rectifier in with no other tubes. Af...bridkarl — 01:54 PM
Restoration of the Canadian General Electric A-87
After applying the filler to the entire body, I noticed that the shades of the facade and the side and top walls were ve...RadioSvit — 01:49 PM
Restoration of the Canadian General Electric A-87
You will be keeping very busy, you may have to go back to work for a break:). PaulPaul Philco322 — 01:46 PM
Restoration of the Canadian General Electric A-87
After removing the control knobs, chassis, dynamics and scale frame, I first started restoring the torn piece of veneer....RadioSvit — 01:20 PM

[-]
Who's Online
There are currently 897 online users. [Complete List]
» 1 Member(s) | 896 Guest(s)
Avatar

>