[Johnson] Ranger I Driver Transformer

[Robert Jefferis]

Mike,

Roy is right on target. Unless you find the exact match by scrounging,  
Hammond is the only practical game in town if you want a new  
transformer. You can search for the best Hammond XFMR prices, but I  
also used AES. I went through this fire drill about a year ago with my  
Viking II, and I wound up elongating a single hole in the chassis to  
accommodate a slightly larger (longer) frame. The turns ratios  
(impedance) are not likely to be directly in line with original, but  
close. I can direct you to a reliable transformer rebuild source if  
you insist on originality (I used him recently on a Collins  
transformer problem), but you may not like the price.

Bob, KF6BC
On Sep 30, 2009, at 6:45 PM, Roy Morgan wrote:

>
> On Sep 30, 2009, at 3:08 PM, Singley, Rodger wrote:
>
>> Mike,
>>
>> I used the Antique Electronic Supply (www.tubesandmore.com) P-T156
>> in a
>> couple of my Johnson transmitters for replacement. ... one of the
>> heavier
>> core units might make sense but for stock audio these work fine.
>
> AES does (or at least used to) sell two such interstage transformers.
> One has the same size and mounting holes as the original.  The other
> is a bit bigger and is less likely to not fail and more likely to give
> "better" audio if you change the interstage caps and the like (See The
> Timtron's mods on The AM Window).  For the larger transformer, you may
> wind up drilling one hole to accomodate the larger frame, or making a
> small bar the size of the new transformer foot print and mounting it
> to that and mounting the bar to the chassis - all with flat head  
> screws.
>
>> Hammond has a number of units available also and they are likely the
>> source for the one Antique sells.
>
> Hammond has a fine reputation.  They make the 600 ohm - to - voice
> coil transformer that AES offers. It's a very good unit.
>
> Roy
>
> Roy Morgan
> k1lky at earthlink.net
> 529 Cobb St.
> Groton NY, 13073
> Home: 607-898-3607
> Cell: 301-928-7794
>
>
>
> ______________________________________________________________
> Johnson mailing list
> Home: http://mailman.qth.net/mailman/listinfo/johnson
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Johnson at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html