Anyone have a feel for what life one might get out of a set of tubes if they left it on for say 12 hours a day most every day? Is this "better" than cycling power say 3 times each day ... I realize t
Boy - butchered that message (that is what I get for burning the candle at both ends)... hopefully the message was understood. What reduction in life of a set of tubes would one get if they left the
Probably NO DIFFERENCE. There are some tubes that can only be cycled once a day, the 3CX800 and 4CX800 arent them. With any tube, I'd save the big ON switch until you knew you were going to need it.
Thanks - but I don't think it is quite the same as a light bulb since the source impedance seen by the filament, especially in amps like the Ten-Tec and ACOM where it is controlled inrush, is higher
Anyone have a feel for what life one might get out of a set of **Chops busting time. OK, Your conditions, I'll restate it again Now I suppose if somebody would like to send me a stack of new lets say
How many bulbs have you had fail the first time you turned it ON? I have had a lot. When you are cycling, you will have results all over the map whether you step start it or not as each tube is an in
I had responded to one individual offgroup... I am self employed and have the ability to monitor the bands all day... thus the ability to work someone if I so choose... Since moving to AZ, or more im
It depends upon the amplifier that you are using. The stock filament transformer on the SB-220 will not put out excessive current at turn-on due to the way it is wound; i.e. "tailor-made for the loa
Author: "John E. Cleeve" <g3jvc@jcleeve.idps.co.uk>
Date: Fri, 9 Feb 2007 00:05:25 -0000
I base my treatment of valve/tube heaters, on the way the filament life of 16mm cine projector high wattage bulbs could be considerably extended if they were brought up to full brightness slowly.....
I have 2 amps here; one is "instant-on" and one has a 4 minute delay at start-up. The latter is turned on every time I turn on my transceiver. I don't think of it as a separate "accessory." I use it
I would leave the amp on. No matter how you start the filament any thermal cycle results in filament stress. The stress might change if you bang a 15 amp filament with 200 amps for a dozen power lin
Gary and I have been discussing this most of the afternoon Much of what weve been talking about is along the lines of what Lou stated here. Basically within reason, I will turn my amp off if I will n
We need to worry about the other ways we hammer the tubes. 73 Tom Truer words were never spoken! Lou _______________________________________________ Amps mailing list Amps@contesting.com http://lists
the more general result of this conversation - if there is an objective result - is to aid others in knowing the answer as well... instead of being told "don't cycle your amp too much"! Gary, I think
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Fri, 9 Feb 2007 10:06:14 +0100 (CET)
off too many electrons to raise their hand, you wouldn't count many hands in the whole country. < Very true. I'm still using a 6L6G that my father bought in 1936 or 7. 73 Peter G3RZP ________________
BINGO! thanks. g. minute delay at transceiver. I every QSO I supply them with noise and fading. amp to warm up! chief tube thousands of that in worked as high habits on and off cited by time a expect
Maybe I've got my list "bounce" problem fixed..... Around 1970 I put together an amp with a pair of Penta Labs used 4-400A's. Around 1988 or so one of the tubes failed due to a filament to cathode sh
I think that the tube manuals somewhere state that the 813 should be turned off if it is idle for more than 30 minutes. ?? Not sure on the time. 73 Gary K4FMX ________________________________________
Yeah Dave, good catch! Please excuse my typo. My brain said grid, my fingers typed cathode. It seems like I spend twice as much time correcting as I do typing these days. Chalk it up to old age. 73,
Hi, not much experience of this, however I once worked for a lamp manufacturer, there was a tendency for lamps to fail at switch on ( I believe we have all seen this). The cold resistance of a typica