[Hammarlund] Re 600ohms audio output
rbethman
rbethman at comcast.net
Tue Feb 2 16:06:05 EST 2010
Yep! And Rat Shack stopped selling them some number of years ago.
The center tapped filament transformer will work just fine. Make it a
12.6VAC one and have a ball!
Bob - N0DGN
kirklandb at sympatico.ca wrote:
> I believe it is a 70V (or 70.7V) line matching transformer.
> They generally indicate an input wattage, and an output impedance, e.g. 4, 8 ohms.
>
>
>> Date: Tue, 2 Feb 2010 14:19:20 -0600
>> From: n0jmy at hayseedhamfest.com
>> To: hammarlund at mailman.qth.net; Glowbugs at piobaire.mines.uidaho.edu
>> Subject: Re: [Hammarlund] Re 600ohms audio output
>>
>> I had a SP-600 years ago and I remember you could easily match (within
>> reason) its 600 ohm output to to a 8 ohm speaker. You just used a
>> cheap-o Radio Shack or whatever filament transformer. One of those
>> about an inch and a half square jobs.
>>
>> It was either 6.3 or 12.6 on the secondary but I can't remember which...
>> and I can't remember the formula.
>>
>> Anybody out there lend a hand?
>>
>> 73,
>> Tom
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