Re: {Collins} 30S-1 Plate Reactor replacement

Hello Chuck,

The guy I bought my 30S-1 from, quite a few years ago, had placed the choke and the big plate transformer on small rubber rings to help eliminate the hum. I put them back in place when I reassembled them (from being removed for shipping) and can barely hear any hum that is generated.

I am not sure if this is a good idea or not but my 30S-1 has always been happy with that "option"

Walt K7CCA

On 11/27/2014 7:21 PM, Charles Rippel wrote:
I wonder if they have a replacement reactor, L-202 for the 30S-1 ?  Mine
buzzes like mad when the HV is applied, gets worse when the amp is keyed.
I'm told that the original is undersized, being rated at "only" 500MA.
That comment got a "hmmmmmmm" from me.  The amplifier loads per the manual
to 350MA so 500MA should be adequate.

I digress, would like to get rid of the buzzing.  If I'm going to pull the
reactor out, would rather replace it with a new part v/s sending it to be


Chuck Rippel

PS:  The R390A's, they just keep a-coming......
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