Re: [AMRadio] Home Brew AM Transmitter Wanted

[W5OMR/Geoff]

Bob Maser wrote:

Anyone out there have a well constructed home brew AM transmitter that 
is laying around collecting dust?  I am looking for one that runs 
350-1000W out and can be fully integrated or one that uses a driver 
for the RF and modulator.  If you have one that you would be willing 
to part with, give me a call at 813-643-3034 or E Mail me.


Thanks for reading 



Hey, Bob.. why not just build one?

I'm sure that somewhere here on the list, you could probably find all 
the parts and tubes you need to build your own.


I'm sure that there are some people here that would nearly give you the 
parts, just to encourage another home-brewing ham.


You could probably run a single 450TH/L, 304TH/L ... how about an 813 in 
the final, modulated by a pair of 811's?


The only problem you might have is finding the iron/transformers.  But, 
it never hurts to ask ;-)


--
73 = Best Regards,
-Geoff/W5OMR

A: Yes.
 Q: Are you sure?
 A: Because it reverses the logical flow of conversation.
 Q: Why is 'top posting' annoying in email?

RE: [AMRadio] Home Brew AM Transmitter Wanted

[Brett gazdzinski]

Building is a LOT of work, but fun.
If you was to ask me, there is not a lot out there
for a reasonable price that is not homebrew and is worth a crap.

30K1, KW1, T368 BC610, Johnson kilowatt, old broadcast TX.

It's a shame I am so attached to my homebrew stuff or
I would sell it and build more.

A pair of 813's at 2000 or so volts does real well,
about 600 watts out.
A pair of 812a's or 811a's does about 300 watts easy, 
and with 811a modulators is a simple stable rig.

The 4-125/250/400 need 3000 volts or more to be real happy,
and that is a stress on some parts.

The hard parts to get seem to be high voltage variable
capacitors, high power switches, old plug in coils that have
not turned to dust, high voltage oil filled caps, and big iron.

On my last transmitter, I wound a pie net coil using 
copper tubing.

Finding lots of nice looking matching meters is hard.

I must have huge amounts of money and time in my homebrew
rigs, and I cant imagine selling them for any reasonable
price and being happy about it. 
I sold my 30K-1 and did not worry about it.

On the other hand, I have seen homebrew stuff at ham fests
that they would have to pay me to take...

Brett
N2DTS

 

 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of W5OMR/Geoff
 Sent: Tuesday, March 28, 2006 11:44 AM
 To: Discussion of AM Radio
 Subject: Re: [AMRadio] Home Brew AM Transmitter Wanted
 
 Bob Maser wrote:
 
  Anyone out there have a well constructed home brew AM 
 transmitter that 
  is laying around collecting dust?  I am looking for one that runs 
  350-1000W out and can be fully integrated or one that uses a driver 
  for the RF and modulator.  If you have one that you would 
 be willing 
  to part with, give me a call at 813-643-3034 or E Mail me.
 
  Thanks for reading