Phil Clements wrote:
>>> Not only is the 3-500Z a more robust tube than the 8877, the 8877
>>> requires a 3 minute warm-up, the circuit for that would be an added
>>> complexity.
>>>
>> A bit, but it is just a time delay to prevent keying up before the warm up
>> period has expired.
>>
>
> It can be made as complex or simple as you desire. When coming in for a
> day/night of operating, switch on the amp and go draw a cup of coffee/807,
> and check the packet cluster spots. By that time, your 3 minutes are up, and
> the amp is ready to go to work. Another cheap idea is to get a three-minute
> egg timer. Regardless of your method, Eimac recommends only one on/off cycle
>
No Way I could adhere to that.
I keep a widely varied schedule and often don't go to bed until some
where between 2:00 and 5:30 AM. I may operate for a while during
different times of the day. Even the heat in my shop is on a timer.
When I turn on the rig I turn on the amp except when just checking to
see if the band is open. If it's not I don't bother with the amp, but
if I'm hearing much of anything and particularly weak signals the amps
go on.. That means my amps my get fired up at many as 5 to 10 times a
day with 5 being typical. I'm not going to leave them running while in
the house...except for the one I have in here..when its in here.
> per day. If you make multiple visits to the shack per day, you might want to
> bite the bullet and install an electronic timer to handle the chore.
>
>
If I fire up the rig when I walk in that's no problem...usually, but I
would find it to be an eternity if I turned on the rig and found
something rare.
> I have 8877's that are over 40 years old, and still making full power. Just
> follow the Eimac rules and recommendations, and you will be a happy camper!
>
>
Guess if I go 8877's I better get a few spares. OTOH I've never had
problems with 8873's, 8874's, or 8875's or 3-500's being turned on and
off many times a day.
73
Roger (K8RI)
>
> (((73)))
> Phil, K5PC
>
>
>
>
>
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