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

Parasitics in 89B Receiver
#1

I have the 89B 123 with the 77 detector.  I had to rewind the oscillator coil as in many other sets and all is working and about to package it up and call it fixed when lo and behold I find a parasitic.  The set is self oscillation on 600 khz and there is a station in this market on that channel.  So out come the bypass cap and see if I can place it across something that will stop the parasitic.  Just wonder if any others have seen this.

Stan Adams
Memphis Icon_e_surprised  Icon_e_surprised

Edit: Model number corrected.
#2

Maybe a few drops of Frontline or Advantage, take care of those nasty critters. Icon_lol

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#3

yea buddy, if you have ever spent a night in a cold transmitter building trying to get birdies out of a broadcast transmitter, now that is some fun!!! Napalm might work better.
#4

Hi Stan
Couldn't find any info on your set unless it is a battery job??
Terry
#5

89B is 34 Tombstone, I had birdies in the first RF Amp-1st Detector/Mixer, just backed the gain down a bit.
#6

Methinks you mean a model 19. Well you could have taken it to France to be with all to other Parisasites.
GL OM
Terry




Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
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
Philco model 38 code 121 not receiving signal.
I've reinstalled the coil. Now IT'S ALIVE!!!!!! I fired up my TinySA on signal generator mode and set it to 1400Kc and ...Stormlord5500 — 11:01 AM
Philco model 38 code 121 not receiving signal.
Yes, Walmart, right up there with Fluke.RodB — 11:00 AM
PT 6 chassis screws size???
it certainly won't be metric! SAE threads were all that was known then. Take care, - GaryGarySP — 10:58 AM
Philco model 38 code 121 not receiving signal.
I think this thing is way more accurate than my Walmart DMM. :DStormlord5500 — 08:19 AM
Philco model 38 code 121 not receiving signal.
Thankyou for the kind words sir. I double checked it with my component tester and it read 2.7 ohms at .02mH.Stormlord5500 — 08:14 AM
PT 6 chassis screws size???
Hello bridKarl, that sounds right or maybe 8/32 . Sincerely Richardradiorich — 01:00 AM
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM

[-]
Who's Online
There are currently 940 online users. [Complete List]
» 1 Member(s) | 939 Guest(s)
Avatar

>