Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

GE 212 FM Antenna
#6

Wow, BrendaAnnD, that's just too simple for me to figure out. Thanks, I'll try it. I figured that imitating the original as closely as possible was the thing to do. Actually, my results aren't very good--very weak signal. Just for grins I tried a dipole with much better results.

I assume I leave the insulation on the 22 ga. wire where it wraps around the power cord?

Against all advice I did try to connect a few different values of caps between power and the FM antenna terminal. I reasoned that when you connect a line filter cap from power to chassis, which I've done on many radios, the cap blocks the AC power, but in theory it couples RF hash ground before it hits the transformer or rectifier. Besides, this radio already has a 47 pf mica between one leg of the power to the ext. AM antenna terminal where anyone could touch it, and the terminal shows no 60 Hz AC at all.

Blocking 60 Hz power but coupling RF to the FM antenna terminal is just what I wanted to do, so I tried it, working very carefully step by step. There really wasn't any result at all with the caps I tried, between .05 uF and 100 pf. When I clipped my test lead by itself to the FM antenna terminal, I got a big boost in signal, but nothing changed when I clipped the other end to the cap that was connected to the power line. The 12 inch test lead gave me nearly as much signal boost as the dipole.

I haven't aligned the FM yet. Maybe the signal will improve when I finish alignment.

John Honeycutt


Messages In This Thread
GE 212 FM Antenna - by Raleigh - 01-28-2014, 01:21 PM
RE: GE 212 FM Antenna - by morzh - 01-28-2014, 02:40 PM
RE: GE 212 FM Antenna - by Raleigh - 01-28-2014, 03:25 PM
RE: GE 212 FM Antenna - by skyscraper - 01-28-2014, 04:26 PM
RE: GE 212 FM Antenna - by BrendaAnnD - 01-28-2014, 09:15 PM
RE: GE 212 FM Antenna - by Raleigh - 01-29-2014, 01:11 AM
RE: GE 212 FM Antenna - by BrendaAnnD - 01-29-2014, 01:28 AM
RE: GE 212 FM Antenna - by Ron Ramirez - 01-29-2014, 09:32 AM
RE: GE 212 FM Antenna - by Raleigh - 01-29-2014, 12:21 PM
RE: GE 212 FM Antenna - by Ron Ramirez - 01-29-2014, 12:28 PM
RE: GE 212 FM Antenna - by Mondial - 01-29-2014, 04:33 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM

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

>