It is currently Thu May 28, 2020 3:15 pm

Click the link below to visit the site sponsor

The Ham Radio Shop




Post new topic Reply to topic  [ 2 posts ] 
 Linear switching 
Online
Contributor 2020
User avatar

Joined: Tue Oct 09, 2012 1:09 pm
Posts: 11305
Location: West Midlands
Feedback: 104 (100%)
Reply with quote
Post Linear switching
I had a rig last week that would not switch a linear, usual story, linear relay needed more current than the rig supplied.

Instead of making up a transistor switch, I used an FET instead, requires no separate DC power, and fits in the cable.

Attachment:
ls1.jpg
ls1.jpg [ 42.1 KiB | Viewed 650 times ]


Attachment:
ls2.jpg
ls2.jpg [ 20.89 KiB | Viewed 650 times ]


I'm sure it must have been done before, very simple and effective though.

_________________
===================
Gee Three Eee Jay Ess - RSGB, SARL, G-QRP, EPC
My email address is correct on QRZ.com
===================


Sat Feb 16, 2019 9:30 am
Profile Send private message

 Linear switching 
Online
Contributor 2020
User avatar

Joined: Tue Oct 09, 2012 1:09 pm
Posts: 11305
Location: West Midlands
Feedback: 104 (100%)
Reply with quote
Post Re: Linear switching
Had quite a few asking for more precise details, so have made a fuller info sheet.

Can't upload it big enough here, if any one wants a higher resolution copy, PM me an email.

Attachment:
1ptt.jpg
1ptt.jpg [ 97.67 KiB | Viewed 407 times ]

_________________
===================
Gee Three Eee Jay Ess - RSGB, SARL, G-QRP, EPC
My email address is correct on QRZ.com
===================


Thu May 02, 2019 1:56 pm
Profile Send private message
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB © phpBB Group.
Designed by Vjacheslav Trushkin for Free Forums/DivisionCore.