[AMRadio] Thordarson transformer question

[Brett Gazdzinski]

They look quite like octal tube socket pins, but have
a black plastic bit on the end the wire comes out of.
You solder the wires onto the pins, like you would
to a tube base type plug.

You can likely use tube base pins, but I don't like connections
that are not secure...

Brett
N2DTS

> -----Original Message-----
> From: amradio-admin at mailman.qth.net
> [mailto:amradio-admin at mailman.qth.net]On Behalf Of Todd Bigelow - PS
> Sent: Wednesday, December 31, 2003 12:10 PM
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] Thordarson transformer question
> 
> 
> Brett Gazdzinski wrote:
> 
> >Thordarson used some type of push pins, they came with the iron.
> >
> >I had a BIG mod transformer, the T-11m78 that had screw terminals,
> >I used it in the 30K-1, and it went with it when I sold it.
> >I have the same transformer with the push pins, its
> >much smaller, has rounded sides, push pins on the side.
> >Must have been a change, the older ones having the terminals?
> >  
> >
> Okay, this makes sense. Mine is the one with the rounded corners, 
> wrinkle paint on the end bells. Nice nickel-plated 'acorn' 
> cap nuts on 
> the ends. The openings look too small for a banana plug but they 
> definitely don't looked threaded either. What do these push pins look 
> like and does anyone have a picture or know of a site that 
> shows them? I 
> don't recall seeing anything anywhere here that would work, but they 
> could be in a parts drawer or box full of 'stuff' and without knowing 
> what to look for, I could pass them over easily (I have a lot 
> of 'stuff').
> 
> >The T-11M78 worked very well in the 30K-1, at 2500 volts.
> >Sounded quite good to me.
> >
> 
> This one is about the size, maybe a bit larger than the plate 
> transformer in my 30K-5, the side tag says 300-500 watts.
> 
> >I have not looked at it, but its likely possible to change out
> >the push pins, by replacing the entire insulators, or adding
> >a screw through each push pin with nuts, lock washers, etc.
> >
> 
> Looks like you'd have to pull the entire side panel off and 
> replace the 
> insulators as one unit on this one, but I could be wrong. One could 
> probably stuff large diameter, stiff wire into the holes too, but I'd 
> like to do it as close to 'right' as possible.
> 
> >I have some of the push pins, but you need quite a few in
> >some configurations, my pair of 4D32 transmitter will be low
> >impedance, and need to parallel up both the primary and secondary,
> >lots of push pins!
> >
> 
> Sounds like these pins must have a hollow head, allowing you to stuff 
> one inside another to double things up?  This one has 6 
> insulators down 
> each side, and the holes are maybe 2-3 times the diameter of a pencil 
> lead. Physically it appears to be the same size as the mod 
> transformer 
> for the 300G, with more connections. But I'm assuming that 
> since the mod 
> transformer for the 300G was a specific unit (instead of 
> multi-match), 
> it required fewer connection points and used studs instead of 
> push pins. 
> The opening for those push pins looks wimpy as all hell 
> compared to the 
> studs.
> 
> ~ Todd  KA1KAQ
> 
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