[JMS] K0EOO Article on "High Power" Millen

[Don Buska]

Yeah it's worth seeing what voltages the supplies provide.  I would
think they all should have  HV for the sweep tube or dual 6146 finals,
LV for the receive and low level transmitter stages and some negative
bias (usually adjustable).  Plus the filament voltages.  So there is a
good chance no modifications would be needed and it would be a good temp
solution.  I see via a quick scan of the HP-23 schematic on-line that it
has just as I described above and should do an A1 job with the 90801.
They list the HP-23 as +820VDC for the HV which may be a little on the
high side.  An external adjustable voltage divider (big adjustable power
resistor - check the handbooks) might be best to bring that down to
+600VDC range.

73

Don N9OO  

-----Original Message-----
From: james_millen_society-bounces at mailman.qth.net
[mailto:james_millen_society-bounces at mailman.qth.net] On Behalf Of
ronnie.hull
Sent: Wednesday, May 31, 2006 4:29 AM
To: dbuska at wi.rr.com; The James Millen Society Members Email Reflector
Subject: Re: [JMS] K0EOO Article on "High Power" Millen


I have a heath HP23 and a Drake p/w for the t4xc here. I guess either
would work. I just hate lashing something up as I would rather have the
right stuff. But I guess we will do what we have to do LOL

thanks for all the advice fellers

Ronnie - W5SUM


---------- Original Message -----------
From: Don Buska <dbuska at wi.rr.com>
To: The James Millen Society Members Email Reflector
<james_millen_society at mailman.qth.net>
Sent: Tue, 30 May 2006 21:10:50 -0500
Subject: Re: [JMS] K0EOO Article on "High Power" Millen

> Ronnie have you ever looked into some of the old SSB transceiver power

> supplies?  Old supplies from Heath, SWAN etc. seem to be reasonably 
> priced and should be able to provide the voltage and current 
> requirements to get a 90801 going.  You don't need a pretty one just 
> functional.  It could be repackaged behind a rack front to
> match in with   the Millen stuff.  An old SWAN 117XC aupply was 
> designed to run two sweep tubes at 700 watts input (for the Swan 
> 700CX), plus all the other tubes in the rig and filaments.  One of 
> those should fly easily on a 90801 transmitter.  They may not be 
> period supplies, but when waiting for the right one to show up they 
> will surve you well.
> 
> 73
> 
> Don N9OO
> 
> ronnie.hull wrote:
> > does anyone know of a HV power supply for the 90801 that is 
> > available, in any shape, anywhere? I have been looking for two years

> > with no luck. Ive just about decided that a working millen station 
> > just isn't going to
happen 
> > for me.
> > 
> > hep me hep me
> > 
> > Ronnie
> > 
> > 
> > 
> > ---------- Original Message -----------
> > From: "Don Buska" <D.Buska at Advantest.com>
> > To: <james_millen_society at mailman.qth.net>
> > Sent: Tue, 30 May 2006 08:08:34 -0700
> > Subject: [JMS] K0EOO Article on "High Power" Millen
> > 
> > 
> >>FYI,
> >>
> >>Bob Sullivan has just added a wonderful article written by Dennis 
> >>K0EOO to the JMS website.  If you haven't seen pictures of K0EOO's 
> >>High Power Millen setup your in for a treat.  Operating the new 
> >>station has to return a person to a time well over fifty years ago.
> >>
> >>Great work Dennis and thanks Bob for the super job with the web
work.
> >>
> >>73
> >>
> >>Don N9OO
> >>______________________________________________________________
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> > 
> > ------- End of Original Message -------
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