[JMS] James Millen station on the air

Bob Sullivan robert at isquare.com
Tue Mar 28 21:37:13 EST 2006


Gary, et. al.

I just chatted with Dennis on 75m AM. He was using his Millen station and 
sounded just great!
This should be an incentive for all you Millen guys to get that stuff 
restored and on the air!  Hi.
I'm almost done with mine which includes the following:

90881 amplifier
90801 exciter
90711 VFO
90831 modulator (speech amp)
90902 scope (for xmit)
90923 scope (for receive)
90281 HV supply (for exciter)
Homebrew HV for amplifier
Homebrew modulator for amplifier (not complete)


73, Bob
WØYVA
Personal site: http://www.isquare.com/personal_pages/ras-hardware.htm


At 09:21 PM 3/28/2006, you wrote:
>Congrats Dennis! I'll be sure to look for you as soon as I get my low 
>power Millen station back on the air.
>
>73, Gary - WA4IAM
>
>
>Dennis Petrich wrote:
>
>>Hello all,
>>
>>I'm just dropping you a note announcing that I got my James Millen station
>>on the air this last weekend.  I took a week of vacation and completed the
>>HV power supply and power modulator, cables and debugging.  So far so good.
>>I have a bit more work to do.  I get about 220w out on AM.  I could get more
>>but I need to increase the number of turns on the swinging link.  I'm using
>>812A's in the 90881 in class C and TZ-40's to modulate them class B.  I have
>>the 5" 90905 scope setup giving me a trapezoid and everything looks very
>>linear.  The 90831 speech amp easily drives the Taylor TZ-40's.  Here is a
>>list of the modules I'm using...
>>
>>90881  500W RF deck with 812A's
>>90800  160-10M exciter with 6L6 & 807
>>90700  Vari-arm VFO
>>90831  40w Speech amp with 6146's
>>90905  5" monitor scope
>>Homebrew 500v, 250v, bias, AC switching, Tune switch and exciter grid
>>current and modulator plate current chassis is rack mounted with the other
>>Millen rack modules.
>>Homebrew 1500v supply and power modulator chassis with TZ-40's sets on the
>>floor on casters.  The modulator uses shunt choke feed and negetive cycle
>>loading.
>>
>>
>>I'll send pictures as soon as I get things cleaned up a bit.  Also, I still
>>need to black wrinkle paint the small 3" rack panel for the LV, bias, AC
>>switching and metering stuff so it doesn't look finished yet....
>>
>>I'll probably be on 75m at 3885 or 3880 all this week (after 7pm) so get on
>>if you get a chance.
>>
>>73's, Dennis, k0eoo
>>
>>
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>>
>
>
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