[AMRadio] Sorta OT but just wondering about RF termination resistors.

W2xj W2xj at w2xj.net
Tue Feb 26 13:21:41 EST 2019


Easy. Put two in series and then parallel another two that are in series.  

Sent from my iPad

> On Feb 26, 2019, at 1:12 PM, Randy Berry <randyn3lrx at gmail.com> wrote:
> 
> Hi,
> I'm looking to buy some RF Termination Resistors off fleabay to make a
> dummy load. ( https://www.ebay.com/itm/113540911710 ) MFJ claims to
> make 2.5K one using 4 50 Ohm resistors (don't know the input rating of
> them, they don't say.)
> 
> But how could they use 4 50 Ohm resistors? In parallel that would be
> roughly 12 Ohms, in series 200 Oms. Just wondering how I could use 2
> of the fleabay resistors to make a 300 watt dummy load without
> changing the resistance. As far as I know it's not possible unless I
> make a splitter to divide the power into 2 loads and send 150 watts
> into each load. They resistors are cheap enough and I have more than
> enough heat sink material.
> 
> I doubt I'll be running more than 50 watts VHF and 25 watts UHF but
> the headroom would be nice in case I do get an amplifier.
> -- 
> tnx es 73 de Randy, N3LRX/8
> https://n3lrx.com
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w2xj at w2xj.net
> 


More information about the AMRadio mailing list