Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old March 7th 04, 09:23 PM
LJ
 
Posts: n/a
Default FS: Yaesu FRB-757 Relay Control Box

This is a Yaesu FRB-757 Relay Control Box, intended to switch such
devices as an external Linear Amplifier. Many of the older amplifiers
have a keying voltage that is too high to be safely switched with the
small reed relay contacts in most modern transceivers. This box has a
keying transistor system and relay that has connectors to 13.5VDC,
the PTT contacts in the radio (or footswitch, etc.) and the radio PTT.
There are also another set of relay contacts (both NO or NC contacts)
coming out to a pair of RCA jacks, which can then directly key your
amplifier, etc. Included is the original box and paperwork with
complete schematic and interfacing instructions.

This is a very handy unit that will work with just about any
transceiver where you need to switch something with your PTT line. I
used one of these on my ICOM IC-751A HF Transeiver to key my external
SB-220 amplifier which had a 120V DC keying circuit (way too high to
key directly with the relay contacts inside the transceiver). $25 plus
shipping.
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: Yaesu G-1000 SDX Rotor with Control Box [email protected] Equipment 0 December 14th 04 08:27 PM
a page of motorola 2way 2 way portable and mobile radio history john private smith Policy 0 December 22nd 03 03:42 AM
FS/FT: Yaesu 5400 AZ-EL Rotator Control Box Jeff Camp Swap 0 October 1st 03 05:37 AM
Yaesu FRG-100 CAT control Birderman Shortwave 3 September 17th 03 10:08 AM
Address the issues, Skippy! Repost #3 Skipp would rather be back in Tahoe CB 5 July 30th 03 07:05 PM


All times are GMT +1. The time now is 01:38 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017