[AMRadio] 572B's going Legacy?

[Jim Candela]

Hi all,

  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.

73,
Jim
JKO





pentalab wrote:

> 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.

>

> Jim

>

>

> 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

> VK6APK

>

> 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.

>>

>> Carl

>> KM1H

>>