[Johnson] Want Ranger pwr xfmr

[C E]

Hey Dee:
That info is terrific! But, is the tranformer new
manufactured or rewind? The nice thing about this
company is that is in my neck of the woods in
Michigan. Cal, N6KYR/8 

--- "Dee C. Almquist" <w4pnt at highspeedlink.net> wrote:

> I suggest Heyboer Transformers. Their quality is
> excellent & so are their
> prices. http://Heyboertransformers.com
> 73 es Dee
> 
> 
> ----- Original Message -----
> From: "John Lawson" <jpl15 at panix.com>
> To: <johnson at mailman.qth.net>
> Cc: <amradio at mailman.qth.net>
> Sent: Friday, November 25, 2005 12:36 PM
> Subject: [Johnson] Want Ranger pwr xfmr
> 
> 
> >
> >
> >    Anyone happen to have a NOS or Good-Used Ranger
> power transformer for
> > sale?  I need one - or a Good-Used Ranger - or, a
> new hobby... ;}
> >
> >
> >     After several hours on the bench last night -
> it is apparent why this
> > old girl was shelved - it came to me with a 5R4 in
> the HV socket, but the
> > fils didn't light, tho the tube was good. So sure
> enough - someone had
> > tied the 5V fil lines back, and there was a 10-ohm
> 10W resistor in series
> > with the B+ lead.
> >
> >    I made a plug-in SS rectifier, installed it,
> switched the rig on - and
> > blew both diodes and both line fuses to little
> bits.
> >
> >    Ok.
> >
> >    So I restored the original circuit - there is a
> definite 'under-load'
> > short from the HV rect fils to the HV winding.
> >
> >    Ok..
> >
> >   Disconnected all that - the LV side works fine,
> Osc runs, buffer runs -
> > can 'zero-beat' to a receiver, frequency of VFO
> seems accurate.
> >
> >   Ok...
> >
> >   Tansformer voltage and resistance checks are
> within 10% of spec.
> >
> > Ok....
> >
> > Put new diodes in put a Variac and ac ammeter in
> the mains line, turned it
> > up slowly - POW.  Actually, with the diodes in
> cicuit, it appears to the
> > Variac / AC Ammeter that the power transformer has
> a dead short. Having
> > replaced the filter caps, and checked the plate
> choke - it ain't them. The
> > B+ line resistance is slightly over 20K.
> >
> > Ok.......!
> >
> >    In this process the power transformer has begun
> to get slighly warm, so
> > I went back to checking the LV side - as I was
> testing, the transformer
> > started to arc internally - and resistance
> measurements now show the
> > fil-to-HV short.  So: It's toast.
> >
> >
> >    While working on it, I did get to listen to a
> wonderful, hours-long AM
> > QSO on 3.885 - altogether seven or eight stations
> from both coasts and the
> > midwest - nice loud sigs, band wide open and quiet
> - little QRN and no QRM
> > (for once)
> >
> >
> > NOW: Today I'll try and get the Valiant healthy.
> >
> >
> >     What else are 4-day weekends for???
> >
> >
> > Cheers
> >
> > John  KB6SCO
> >
> > Johnson mailing list
> > Home:
> http://mailman.qth.net/mailman/listinfo/johnson
> > Help: http://mailman.qth.net/mmfaq.html
> > Post: mailto:Johnson at mailman.qth.net
> >
> 
> Johnson mailing list
> Home:
> http://mailman.qth.net/mailman/listinfo/johnson
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Johnson at mailman.qth.net
> 



		
__________________________________ 
Yahoo! Music Unlimited 
Access over 1 million songs. Try it free. 
http://music.yahoo.com/unlimited/