Peter,
Do you know how clean the synthesiser is in the
MA1723? I have often wondered, as its quite an
old design, but never had the equipment to measure it.
The old Racal TX I use from time to time on-air
features an MA1723 as the exciter, followed by a
Class A solid state stage (drawing about 10 Amp
at 28 Volt with a pair of BLW96 to give 10 - 20
Watts for the valve [passive] grid!), followed by
a single 4CX1500B. The valve section, has two
motor driven roller coasters (for L1 and L2 in
the Pi-L) and enough solenoids and relays to keep
this OM amused. The TX has full auto tune (about
5 seconds tune time for any freq. between 1.6 -
30 MHz) and is truly a thing of beauty.
If anyone has an unwanted spectrum analyser,
please send it to me. I'll wait in all day for
delivery and post any useful measurements I make back here pro bono!
Regards.
Mark.
-----------------------------------------------------
At 17:27 02/07/2006, Peter Voelpel wrote:
>Why not,
>if you don´t bother the power bill you can easily achieve a super clean
>legal limit signal which will be much better then any ham linear.
>Of course it needs to be be driven by a transmitter with best purity,
>perhaps the PT-8000C could be nice or a Racal MA1723 with a 4CX350J or
>YL1050 in class A as the driver ;-)
>
>73
>Peter, DF3KV
>
>-----Original Message-----
>From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>Behalf Of Jan Erik Holm
>Sent: Sonntag, 2. Juli 2006 17:55
>Cc: amps@contesting.com
>Subject: Re: [Amps] 4CX10 000J
>
>surely no ham would use a thing like that, or?
>
>/ Jim SM2EKM
>----------------
>
>Peter Voelpel wrote:
>
> > All the J-types are low distortion, gain of both is about 20db
> >
> > 73
> > Peter, DF3KV
> >
> > -----Original Message-----
> > From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> > Behalf Of Joe Subich, W4TV
> > What are the differences between the 4CX1000J and 4CX10000D -
> > particularly to explain the 10 KW vs. 15 KW output difference
> > in the "normal operation" figures on the Eimac short form
> > catalog (www.cpii.com/eimac)? Of course, with a listed gain
> > of 4.5, it would seem to take 2500 W or so to drive either of
> > them to their full capability ...
> >
>
>
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>
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*******************************************
Mark Hill - G4FPH
E-mail: g4fph@mjha.co.uk
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
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S witch off
I solate
D ump
E arth
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