[Amps] TV sweep tubes and 6146s

[Karl-Arne Markström]

This particular transformer was a special brand of surplus HV transformer, 
coming out of the first generation microwave ovens from the Swedish manufacturer Husqvarna.

It had a 2200 V 1,1 A CCS secondary winding and several primary windings 
(220/440V if i remember correctly), and it was not of the saturated magnetic circuit type 
that become standard in later designs of microwave ovens.

Three of those in delta-wye connection with a six-pulse rectifier made an almost perfect 
three-phase HV PS for 4-1000A's in parallel.

Today's microwave oven transformers are not directly suited for HV supply service,
unless they are modified.

73/

Karl-Arne
SM0AOM




----- Original Message ----- 
From: "va3pl @ cuic.ca" <va3pl at cuic.ca>
To: <amps at contesting.com>
Sent: Wednesday, August 10, 2005 5:53 PM
Subject: Re: [Amps] TV sweep tubes and 6146s



----- Original Message ----- 
From: "Karl-Arne Markström" <sm0aom at telia.com>
To: <amps at contesting.com>
Sent: Wednesday, August 10, 2005 11:43 AM
Subject: Re: [Amps] TV sweep tubes and 6146s


> [used in 1979 as an IPA (!) ]. Total cost: 200 SEK (approx. 50 USD today)
, of which the ex-microwave oven power transformer (95 SEK + carriage) took
half.
>

Is anybody building small amp using microwave oven power transformer?
How those transformer are made and what kind of winding they have?

Andy - VA3PL



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