[Boatanchors] Rectifier tube for the HQ-170

Thu, 5 Dec 2002 17:54:41 -0600

Hi Kurt,

You are correct on the current ratings for the two tubes....Here is also the
voltage ratings:

5Y3G             5U4GB
Maximum RMS supply voltage per plate -       350V               450V

Good luck!

Ken....N5CM....NNN0FKQ....

----- Original Message -----
From: "Kurt Brandstetter" <[email protected]>
To: "Hammarlund EGroup" <[email protected]>
Cc: "Boatanchors List" <[email protected]>
Sent: Thursday, December 05, 2002 4:59 PM
Subject: [Boatanchors] Rectifier tube for the HQ-170

> Hello from Vienna !
>
> I need some help !
> Can I use a 5Y3G rectifier tube instead the 5U4GB thats used (I hope I'm
> right) in my HQ-170 ?
> My 5U4GB has "lost" the plastic insert (in the middle of the ocatl tube)
and
> so it has only the 8 pins. Once I made a failure (without knowing it) as I
> put out the 5U4GB from the socket and did'nt note the correct insert.
> Unlucky as I was I set it in wrong and in some seconds the power supply
> transforem run hot and began to "smoke" a bit. I disconnected the receiver
> immediatly and so I hope there is no damage. The tube and the receiver is
> working after inserting the tube correct.
>
> But I have no spare 5U4GB, only a 5Y3G which has the same pin connections.
> But as I know the 5Y3G can only work with I=125 mA; the 5U4GB works max.
> I=275 mA (Am I correct ??). So I think (but don't hope, hi) that this is
not
> a correct tube for the HQ-170. But where to get a spare one here ??
>
> Another question: how can I check if I have damaged the power supply
> transformer while inserting the rectifier tube wrong ? I had it running
> after cooling down for 10 minutes but want to aks first before I use the
> HQ-170 for a longer time to prevent more damage.
>
> Any help would be greatly appreciated !
> TIA.
> Perhaps someone of you has 2 spare 5U4GB for me ? Would be fine, but is
> shipment save ?
> I live in Vienna - Austria. And whats a correct price for a new one or a
> good used 5U4GB ?
>
> Kurt
> --
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