(Posting this for a local fellow ham who currently isn't on the web) As the subject line says, a local ham friend of mine asked me today about how to go about checking out/waking up a 3-500 (Z?) that
put it in your amp only turn on the filament and let it run for 5 or 6 hours until you turn on plate voltage. I know a ham that had 34 304tl tubes and that what he did. y --Original Message-- From: A
There is no way to do this with the AL-80B. A tube such as the 3-500 does not need any "burn in" time. 73 Bob, K4TAX -- Original Message -- From: "Rodney" <w3krq@dejazzd.com> To: <wb5jnc@centurytel.n
I have an Ameritron AL-80B on my desk that I drive with my Omni VII. It does not have a dedicated HV or FIL switch. When the amp is switched ON, it brings up, with delay, the filament voltage and the
Second that. Mike W8TRN -- Original Message -- From: "Rodney" <w3krq@dejazzd.com> To: <wb5jnc@centurytel.net>; "Discussion of Ten-Tec Equipment" <tentec@contesting.com> Sent: Sunday, August 03, 2014
Everything authoritative (i.e, from Eimac) says that running the filaments does nothing. I've read from several amp designers that the 3-500Z simply doesn;y leak, so the vacuum remains patent. The on
RF PARTS suggest that you do that. There is no way to do this with the AL-80B. A tube such as the 3-500 does not need any "burn in" time. 73 Bob, K4TAX -- Original Message -- From: "Rodney" <w3krq@de
If it were an external anode tube with a indirectly heated cathode a burn-in period would be appropriate. With a glass envelope tube and a coated filament, there is no need to burn-in the 3-500. The
A know a ham you got two used 3-500z he put them in his amp after about 5 minutes the one tube shorted took out the bias circuit. If it were an external anode tube with a indirectly heated cathode a
With some music instrument tubes and lamps, and some automobile lamps (more older than those used at present) it was once fashionable to avoid touching and leaving greasy finger prints on the glass e
In as much as the glass envelope contains a very high vacuum, as a safety precaution, most tube companies suggest handling with gloves in the event of breakage and subsequent implosion. And one shoul
Eimac and Amperex say nothing about burning in new 3-500Zs. Since gettering with Zirconium does not take place until red heat is reached - the tubes getter themselves if they are simply put in servic