Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

donate to eham
   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: How to interface HW-101 to SB-220 amp  (Read 748 times)
KD0ZGW
Member

Posts: 1056




Ignore
« on: March 24, 2019, 11:19:37 AM »

Recently got my HW-101 working well.  Used it for my weekly net check-in and got very nice signal and audio reports.

1st boat anchor for me.  Just scored a deal on an SB220 amp and would like to interface but as far as I can tell the HW-101 lacks a amp relay output.  The manual pic implies an amp relay output exists in the main connector on the back but doesn't show any detail.

what is required to make this interface work?

Thx to anyone taking the time to offer advice or links.

KD0ZGW
Logged
KD0REQ
Member

Posts: 2404




Ignore
« Reply #1 on: March 24, 2019, 11:55:01 AM »

details should be in either one of the manuals (and there are bootlegs all over the place if you don't have them or want to order from The New Heathkit.)  essentially, connect the ALC line, coax into the amp from the 101's antenna, and there is another phono jack on the back of the 101 that will key the amp. the 3-500 is an "instant on" tube, and the amp does the antenna switching, but I expect it takes a couple seconds to build HV and heat the cathode in the 220.  being a manual tuned tube amp, you're  going to have to key the 101 in CW to tune the 220 off frequency so you don't step on a QSO. no need to retune on freq from a few KHz off. unless you're loading into a floor lamp's cord.
Logged
W5RKL
Member

Posts: 1113




Ignore
« Reply #2 on: March 28, 2019, 03:35:48 AM »


Disconnect the power cable from the rear of the HW-101.

Remove the top and bottom covers and turn the HW-101
upside down, rear panel facing you.

Find the "BLACK" wire in pin "11" on the rear panel power connector.

Heat pin 11 and pull the BLACK wire from pin 11.


If the BLACK wire will not reach the center terminal of the SPARE
RCA socket, add a small length of BLACK wire to lengthen the wire.
Run BLACK heat shrink tubing over the connection then connect the
free end of the BLACK wire to the center terminal of the SPARE RCA
socket.

You now have a N.O. (Normally Open) "RELAY" connection you can
connect to a linear amplifier's "RELAY" socket. I've done this wiring
change to all 3 of my HW-101s and SB-100. I changed the socket
label from "SPARE" to "AMP RELAY".

The SB-220 has "120VDC" on it's "ANT" (RELAY) socket.

73
Mike W5RKL
www.w5rkl.com
RMC(SW) USN RET


Logged
KD0ZGW
Member

Posts: 1056




Ignore
« Reply #3 on: March 29, 2019, 08:29:01 AM »

Mike; thx for detailed advice. 

KD0ZGW
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!