hey m8 just got this email from a company that sells these DX500V LINEAR AMPS,he reckons you need 2 40 amp psu,s to run this amp to its maximum.
i suggested a 60 amp psu to him and he said no use as it would keep tripping out.
heres the email:
Cheaper than buying 1 large one to run it with...Just uses one more set of wires..RM psu has a 13.8 switch so both are locked on 13.8.
Not as hard as it sounds.
I had 4 diamond 40 amp supplies feeding my 1 KW amp for years with no problems.
Best do it right first off so no troubles later on...You will trip a 60A supply with the DX500 enough times to **** you off.
It is effectively almost twice as strong as the KL500 and sounds better.
But it only works on 10-12m
KL500 is quite broad so not optimized higher up like the DX500.
Power out means power in+++
Don't trust the power/swr meter. Go off the amps and voltage and efficiency to get true power out.
2 40A supplies cost about the same as one 60A or they do over here!
So for price I reccomend the 2 ea 40's which gives lots of headroom for when you start pounding it..as you will!
Do you have a good SWR meter that can handle 500W?
The increase in power can cause things that are not up to snuff to burn up and part causing the line to go open and you will kill the amp in short time if you are not watching things.
I always monitor the SWR with these amps.
If you see the SWR start creeping up as you use it then something in or on the end of your coax is getting hot....
Just want you to be aware that there is a downside to running hi power. Some antenna's can not take it! Specially those with coils.
The DX500 is a serious amp despite the size. I would not be saying these things if you were buying the KL500 because it doesn't have the grunt of the DX500.
what do you guys think?,seems bit weird to be using 2 40 amp psu,s to run this linear?.
a local has one, they use 4x 2sc2879 transistors, 7w fm input gives 400w fm output on a bird43 meter, more if you drive it harder,
they run hot so need cooling if you want it to last for years, i would recommend a medium to high flow 120mm fan mounted close to the fins and blowing onto the heatsink.