1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
Model 90B Tinkerer
Mondial
Phorum Expert
*****
Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY
#32

02-01-2022, 09:31 PM
Those 3D printed replacements look great. With the blue color they look exactly like modern Sprague 36D electrolytics! 

Interested to see what they would look like made from metallic filament. Also nice to see the latest design is easily restuffable and really applicable to almost any radio.

As to your oscillator problem, I wonder if something is seriously off with the oscillator coil. From your measurements, the oscillator tuning range is so far off that it looks like you have high side oscillator mixing at the lowest freqs (+175 kc) and low side at the top of the band (-175 kc). That would explain why you receive signals at the low end and high end but get no reception in the middle. 

What you may be hearing is the normal high side mixing at the low end and the image response at the high end of the band.


Attached Files Image(s)
   
(This post was last modified: 02-01-2022, 09:40 PM by Mondial.)
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Model 90B Tinkerer - by Simon Wa3uay - 11-17-2021, 02:58 PM
RE: Model 90B Tinkerer - by Bob Andersen - 11-17-2021, 10:25 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-18-2021, 01:43 PM
RE: Model 90B Tinkerer - by Bob Andersen - 11-18-2021, 06:12 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-19-2021, 04:07 PM
RE: Model 90B Tinkerer - by radiorich - 11-20-2021, 12:50 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-20-2021, 01:31 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-24-2021, 04:11 PM
RE: Model 90B Tinkerer - by morzh - 11-24-2021, 05:02 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-25-2021, 09:58 AM
RE: Model 90B Tinkerer - by cknob - 11-25-2021, 10:43 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-25-2021, 10:58 AM
RE: Model 90B Tinkerer - by cknob - 11-25-2021, 01:25 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-27-2021, 09:40 AM
RE: Model 90B Tinkerer - by morzh - 11-27-2021, 02:48 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-14-2022, 01:18 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-16-2022, 11:37 AM
RE: Model 90B Tinkerer - by Mondial - 01-16-2022, 01:22 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-21-2022, 11:25 AM
RE: Model 90B Tinkerer - by Mondial - 01-21-2022, 11:39 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-21-2022, 04:06 PM
RE: Model 90B Tinkerer - by klondike98 - 01-22-2022, 01:26 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-22-2022, 02:35 PM
RE: Model 90B Tinkerer - by Ron Ramirez - 01-22-2022, 02:58 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-23-2022, 11:32 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-26-2022, 09:09 AM
RE: Model 90B Tinkerer - by Mondial - 01-26-2022, 11:38 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-01-2022, 01:39 PM
RE: Model 90B Tinkerer - by Mondial - 02-01-2022, 02:12 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-01-2022, 02:23 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-01-2022, 03:09 PM
RE: Model 90B Tinkerer - by Mondial - 02-01-2022, 09:31 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 02:32 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 02:39 PM
RE: Model 90B Tinkerer - by Bob Andersen - 02-09-2022, 02:48 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 02:53 PM
RE: Model 90B Tinkerer - by GarySP - 02-09-2022, 02:57 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 03:13 PM
RE: Model 90B Tinkerer - by Mondial - 02-09-2022, 03:36 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 03:41 PM
RE: Model 90B Tinkerer - by Steve Davis - 02-09-2022, 04:20 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 04:33 PM
RE: Model 90B Tinkerer - by Steve Davis - 02-09-2022, 05:40 PM
RE: Model 90B Tinkerer - by Ron Ramirez - 02-09-2022, 08:51 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-11-2022, 08:08 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 08-06-2022, 03:40 PM



Users browsing this thread: 12 Guest(s)
[-]
Recent Posts
Philco circuit master 7004
If anyone is interested in owning this item. Lemeno.  Shoot me an offer or something cool to trade if equal value.  I ...Jdow927 — 01:28 AM
Philco circuit master 7004
Hello jdow927, Welcome to the Philco Forum and what great gift that meter looks to be in nice shape . Those jacks were...radiorich — 12:50 AM
Philco circuit master 7004
Brother in law just dropped this off at my house. It is in good shape. Leather strap /handle Is there. No cracks. Case i...Jdow927 — 12:34 AM
Gloritone 27 Radio
Also since motor run caps are non polarized, and typically AC rated, you don't have to worry about ripple, or ESR with t...Arran — 11:32 PM
Gloritone 27 Radio
Motor run caps are also used in portable brush less generators.David — 08:41 PM
Gloritone 27 Radio
Motor caps are yooge. Of course, used with things otehr than motors, they are also almost eternal.morzh — 06:48 PM
Gloritone 27 Radio
I was planning on using motor run caps because the original electrolytic cans, which I believe were in cans, are missing...Arran — 05:40 PM
Atwater-Kent 84, restoration.
OK, it worked, but there is that hum issue. I traced it to the balancing resistors from the 47 tube's filament to GND. ...morzh — 02:42 PM
Philco 46-480 Electronic Restoration
I decided to commit to buying the other 46-480. $75 isn’t terrible, considering that they’ll be traveling through Oklaho...jrblasde — 10:16 AM
Gloritone 27 Radio
I have got petty far along on the radio so far. My chassis is upside down as Richard says. The caps in big clamp are lon...dconant — 09:31 AM

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

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration