The AM Forum
April 18, 2024, 09:52:11 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
« previous next »
  Print  
Author Topic: ISO Signetics Device  (Read 3708 times)
0 Members and 1 Guest are viewing this topic.
WA2SQQ
Contributing
Member
*
Offline Offline

Posts: 1092
« on: March 31, 2022, 10:03:47 PM »
I'm wondering if anyone can help me find this one.... got involved in an interesting restoration project
* 25120-bw.pdf (80.38 KB - downloaded 182 times.)
Logged
Pete, WA2CWA
Moderator
Member

Offline Offline

Posts: 8162


CQ CQ CONTEST


WWW
« Reply #1 on: March 31, 2022, 10:55:50 PM »
When you find one; please let us know.
They're probably still being marketed by the same company that pioneered the dark-emitting diode and dark bulb technology
Logged
Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
WB3JOK
Member

Offline Offline

Posts: 637
« Reply #2 on: March 31, 2022, 11:30:43 PM »
You're supposed to post that one tomorrow (April 1st)  Grin

I have several WOMs, but don't know if they are pin compatible with the Signetics part!  Cool
Logged
WA2SQQ
Contributing
Member
*
Offline Offline

Posts: 1092
« Reply #3 on: April 01, 2022, 08:22:36 AM »
I’m also in search of LADs (light absorbing diodes)
Logged
WA2SQQ
Contributing
Member
*
Offline Offline

Posts: 1092
« Reply #4 on: April 01, 2022, 11:10:26 AM »
Back in the 20's, potentiometers were scarce, so you adjusted the gain of a receiver by changing the value of the grid leak resistor. Resistors were cartridge type. MUTER released a Grid Leak Drip Pan that hung on the resistor.

* Grid Leak Drip Pan_01.jpg (1593.2 KB, 1800x1350 - viewed 224 times.)

* Grid Leak Drip Pan_02.jpg (1382.54 KB, 1800x1350 - viewed 193 times.)
Logged
WA2SQQ
Contributing
Member
*
Offline Offline

Posts: 1092
« Reply #5 on: April 01, 2022, 11:13:13 AM »
And for all you who live in VT ..

https://www.npr.org/templates/story/story.php?storyId=4571982
Logged
W1RKW
Contributing
Member
*
Offline Offline

Posts: 4410
« Reply #6 on: April 01, 2022, 11:24:24 AM »
My 75m Repeater Duplexer Setup

* Duplexer.jpg (383.23 KB, 1280x853 - viewed 188 times.)
Logged
Bob
W1RKW
Home of GORT. A buddy of mine named the 813 rig GORT.
His fear was when I turned it on for the first time life on earth would come to a stand still.
KB2WIG
Contributing
Member
*
Offline Offline

Posts: 4484
« Reply #7 on: April 01, 2022, 06:46:19 PM »

 Before you try the Signetics device,


Electrical Engineers Toolkit: Analog Designer's Edition

https://www.youtube.com/watch?v=vBvYHowmRWI

may be of help.

klc
Logged
What? Me worry?
W3SLK
Member

Offline Offline

Posts: 2656

Just another member member.
« Reply #8 on: April 02, 2022, 10:12:19 AM »
KB2WIG said:
Quote
Before you try the Signetics device,


Electrical Engineers Toolkit: Analog Designer's Edition

https://www.youtube.com/watch?v=vBvYHowmRWI

may be of help.

klc
Now THAT was awesome!!!  Cheesy
Logged
Mike(y)/W3SLK
Invisible airwaves crackle with life, bright antenna bristle with the energy. Emotional feedback, on timeless wavelength, bearing a gift beyond lights, almost free.... Spirit of Radio/Rush
W1RKW
Contributing
Member
*
Offline Offline

Posts: 4410
« Reply #9 on: April 03, 2022, 11:05:20 AM »
rub a little Ideal Cream on your diode!  LMAO! 

Quote from: KB2WIG on April 01, 2022, 06:46:19 PM

 Before you try the Signetics device,


Electrical Engineers Toolkit: Analog Designer's Edition

https://www.youtube.com/watch?v=vBvYHowmRWI

may be of help.

klc
Logged
Bob
W1RKW
Home of GORT. A buddy of mine named the 813 rig GORT.
His fear was when I turned it on for the first time life on earth would come to a stand still.
Opcom
Patrick J. / KD5OEI
Contributing
Member
*
Offline Offline

Posts: 8309



WWW
« Reply #10 on: April 05, 2022, 02:35:17 AM »
Quote from: WA2SQQ on April 01, 2022, 11:10:26 AM
Back in the 20's, potentiometers were scarce, so you adjusted the gain of a receiver by changing the value of the grid leak resistor. Resistors were cartridge type. MUTER released a Grid Leak Drip Pan that hung on the resistor.

Once the resistor was up to temperature, perhaps it could be basted!
Logged
Radio Candelstein - Flagship Station of the NRK Radio Network.
Pages: [1]   Go Up
  Print  
The AM Forum  > THE AM BULLETIN BOARD > QSO > Topic: ISO Signetics Device
 « previous next »
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.116 seconds with 18 queries.