|[AMRadio] 572B's going Legacy?|
jcandela at prodigy.net
Mon Nov 26 20:27:26 EST 2007
I ran into the following info from another source (yahoo ham_amplifiers). It looks like the Chinese 572B manufacturing may have already ended. That leaves the Svetlana version. see info below.
> Gents.. this from AMPS. It appears that Chinese 572-B's are no
> longer going to be made... and that the Svetlana 572-B is a dud for
> RF.. I read somewhere that the Svetlanan version is for audio use
> only.. and the anode is smaller inside the glass envelope... and
> also doesn't hi-pot test as high.
> Yep, dead right. I buy them in direct from China for resale in
> Australia and can attest to their excellent quality.
> There is one downside however. The Shuguang factory which makes the
> tubes has decided to DISCONTINUE the 572B. Stocks have all but dried
> up and there won't be any more. As I write this, the last 22 tubes
> that I could source in China, are on their way to me
> There is obviously no money in glass rf tubes. The upsurge in tube
> hifi has seen to that.
> 73, Alek
> At 01:49 AM 23/11/2007, jeremy-ca wrote:
>> All Chinese tubes are the same now. All RF Parts does is charge you
>> more for the honor of having their name on them.
>> Ive bought directly from Hong Kong as well as the Pentas, no
>> problems in Clippertons or on 6M.
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