[Boatanchors] FT-101

[George Morton]

Barrie - If you get 120 watts out from sweep tubes, you are doing about the 
max as is!  These tubes are not designed for continuous duty cycle.  I would 
not recco more than 25 watts continuous output for use as a driver.  Check 
Sylvania's tube manual for specs on 6GJ5 (a common sweep tube).  That should 
trim your sails a bit. Brgds, Geo
----- Original Message ----- 
From: "Barrie Smith" <barrie at centric.net>
To: <boatanchors at mailman.qth.net>
Sent: Tuesday, September 02, 2008 4:19 PM
Subject: [Boatanchors] FT-101


>I tested both of the newly aquired FT-101s over the weekend.  Into a dummy 
>load, I got in about 120 watts, according to the Bird.  I think I could 
>have gotten more, but I was using a 60 watt dummy load and I didn't want to 
>burn it out.
>
> A couple of questions:  According to a set of tune-up instructions I found 
> on the web, the bias is to be set at 60 ma.  On the FT-101 meter, I see on 
> the top "60 db", the next line is .1, .2, .3 etc.  The third line down is 
> ALC.  There is no line on the meter that reads ma.
>
> I think the second line down, and .6 would be 60 ma?
>
> I was going to sell both of these rigs (the FT-101E & EE), but now I'm 
> thinking of keeping one of them as a VFO and driver for push-pull class C 
> rigs (not linear amplifiers).
>
> I've never owned a sweep-tube until now, so I wonder how well these tubes 
> would stand up producing 50 to 100 watts (in CW mode) continuously for 
> several minutes?
>
> 73, Barrie, W7ALW
>
> _______________________________________________