25 ohm coax

Everything technical about radio can be discussed here, whether it's transmitting or receiving. Guides, charts, diagrams, etc. are all welcome.
Post Reply
Banus_radio
no manz can test innit
no manz can test innit
Posts: 124
Joined: Wed Aug 24, 2016 9:58 pm

25 ohm coax

Post by Banus_radio » Tue Nov 08, 2016 8:53 pm

Hello all

Can I get some advice again please :D :cry:

I have 150w amplifer which has a 25ohm coaxial transformer on it at the output right before the filter. Its approx 12cm's long but ive stupidly damaged it. I didnt have any 25ohm coax laying around and its a little pricey to buy just for 12cm of it.

So to get my amp running ive installed 2 lengths of 50ohm RG316 side by side both measuring the same length as the damaged piece removed. The amp is running and giving the same power as before, both lengths of coax is only warm (Same as before), and its clean on my analyzer.

Is it ok to do this, I guessing it works same as a resistor, 2 parerell 50ohm producing 25ohm total impedance. Or should I order some 25ohm?
Thanks in advance

User avatar
Analyser
tower block dreamin
tower block dreamin
Posts: 319
Joined: Fri Sep 26, 2014 9:11 pm

Re: 25 ohm coax

Post by Analyser » Wed Nov 09, 2016 8:27 am

Good logic and yes, it's fine.

radium98
proppa neck!
proppa neck!
Posts: 973
Joined: Fri Aug 26, 2016 7:01 pm

Re: 25 ohm coax

Post by radium98 » Wed Nov 09, 2016 6:03 pm

:tup agree safe but must handle the power :) teflon etc ....

Banus_radio
no manz can test innit
no manz can test innit
Posts: 124
Joined: Wed Aug 24, 2016 9:58 pm

Re: 25 ohm coax

Post by Banus_radio » Wed Nov 09, 2016 8:15 pm

Thankyou everyone. I'll post some pics up of my projects soon

Post Reply