Subj : Re: Storage
To : Holger Granholm
From : Ed Vance
Date : Fri Jul 04 2014 10:17 am
07-02-14 21:38 Holger Granholm wrote to Ed Vance about Re: Storage
HG> @MSGID: <
[email protected]>
HG> In a message dated 06-30-14, Ed Vance said to Holger Granholm:
HG> GE Ed,
GM Holger,
HG> It has been a busy day today so that's why I continue with echo
HG> mail now
HG> Also we had a taste of summer with 17. C so I made a 10 km
HG> scandinavian walk dressed in shorts and shortsleeved shirt.
Glad to hear the WX has improved in Your area.
WX here is in the 59F/15C to 79F/25C range today and expected to reach
88F/31C B4 Sunday Night when we have a chance of Rain.
HG> For tomorrow we have varying forecasts between 14. and 21. in
HG> the afternoon so the meteos have covered themselves, hi.
I think "the WXman makes a new forecast every hour".
But that's their job.
EV> I suppose I could give it a "Smoke Test" by loading it in the
EV> Heathkit Cantenna.
HG> Yeah, do that and you'll get back to the dawn of digital
HG> communications.
EV> While I was searching for the HEATHKIT Catalog I flipped the Power
EV> Switch and the Filament Switch on the TS-520S to ON.
EV> After finding that 1967 catalog I loaded up the XCVR to the
EV> Cantenna.
EV> It dipped to 200 ma CW in the IP Meter Position and I didn't SEE or
EV> SMELL any Smoke in the Ham Shack.
HG> To make the smoke test you don't even have to connect a dummy
HG> load. The HV is normally highest while the transceiver is
HG> idling because the HV is there all the time while the final
HG> tubes are only cut-off by the grid bias.
HG> You was lucky that no smoke emerged but don't feel safe yet. It
HG> may come next time you switch on the transceiver. Normally,
HG> starting up old tubes you should let only the filaments on (at
HG> reduced voltage ) fopr several hours to burn away the gases
HG> that have leaked in because the glass seals for the tube
HG> element wires are not air tight.
I was thumbing through those Heathkit Catalogs about 35 minutes before
I tuned up the rig.
I saw the comment You wrote to Tom about gases leaking into old tubes,
I never heard of that b4, Thanks for sharing that.
HG> Then switch on the HV while feeding a reduced (via a variac)
HG> mains voltage to the transmitter to let the electrolytics
HG> recover from a long hiatus. After that the mains supply voltage
HG> may be slowly increased while smelling for smoke or listening
HG> for arcing.
Yes, it is better to be safe than sorry.
I hadn't thought of starting out with a lower A.C. Voltage.
I may have a Variac, can't remember for sure, but think I got one at a
Ham Radio Flea Market a long time ago but never used it for anything.
... A soldier surviving mustard gas is a seasoned veteran.
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