The AM Forum
April 19, 2024, 09:53:31 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 2 [3]   Go Down
  Print  
Author Topic: Johnson Matchbox 250-23 and Doublet questions.  (Read 35177 times)
0 Members and 1 Guest are viewing this topic.
WA1GFZ
Member

Offline Offline

Posts: 11152



« Reply #50 on: December 24, 2009, 03:45:13 PM »

HUZ, I was at our lightning Contractor test house and saw a cool coil made from 1/4 inch. They used large chrimp lugs as taps. The small hole size was just right for a banana plug and the bolt side of the lug was wrapped around the coil and soldered.
W1GUC (SK) told me once that a real QRO tank tap is never soldered, it is bolted. He turned me on to my first model 85 band switch. He told me solder will melt and you would lose the connection.
Logged
Steve - WB3HUZ
Guest
« Reply #51 on: December 24, 2009, 07:24:08 PM »

Banana plug. That would be FB!
Logged
WA1GFZ
Member

Offline Offline

Posts: 11152



« Reply #52 on: December 24, 2009, 08:11:32 PM »

Yup, I thought it was a cool idea. Just plug the banana plug in to make the tap connection. The lugs were bent so a banana plug would go all the way into the back of the lug. A tuner would require 2 of them and maybe a couple more to switch between shunt and series mode.
Logged
Pages: 1 2 [3]   Go Up
  Print  
 
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 0.064 seconds with 19 queries.