Steve -
OK, cool!. Yeah, it didn't take long for Drake to put out a field change to add the DELAY pot to
the back panel for the T-4X. The TR-3 and TR-4's all had a fixed delay, a selected resistor in the
VOX section. You could vary the delay somewhat by increasing or decreasing the VOX GAIN control,
but this is just one more fact that the TR-3/4(any) are very good _SSB Mobile_ transceivers! :-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Steve Wedge wrote:
Based on what I can get out on 15, I'm suspecting that I'll need to re-do the 10 alignment. The
previous owner said he rarely used it on 10 and mostly QRP. The fact I can get 100W+ on 15
suggests I just need to realign based on what you've said here.
I'm loving a feature that not too many people mention as an advantage of the B over the T-4X: a
separate VOX delay control on the rear apron. This allows me to get nearly QSK CW - though I've
got it set for more of a delay to save the relay and finals. Still, the T/R changeover on CW
certainly is more like the C-Line.
Thanks for the as-always valuable info.
Steve Wedge, W1ES/4
To be is to do - Socrates
To do is to be - Plato
Do be do be do. - Sinatra
All my computers have my signature with various pearls of wisdom appended
thereto.
--------------------------------------------------
From: "Garey Barrell" <[email protected]>
Sent: Saturday, October 01, 2011 11:13 PM
To: "Steve Wedge" <[email protected]>
Cc: "Drake List" <[email protected]>
Subject: Re: [Drakelist] What's normal 4-line output on 10m?
Steve -
You should be able to get 100+ Watts output on 10M with the T-4X(any).
I was just explaining the other day to 'someone' the problem of the padder capacitors on the side
of the T-4X. The 10M, (and sometimes even 15M,) padders are at or near minimum capacity for
proper alignment. The result is that there is essentially no tension on the adjustment, meaning
that often just turning the transmitter right side up after alignment is enough shock/vibration
to move them off setting. This is why I always put a drop of fingernail polish on the adjuster
heads for 10 and 15M. The rest have plenty of tension and hold just fine. Also, be sure the
padder actually 'peaks'. IF the RF Drive is set wrong during alignment it's possible to get to
where even minimum is still too much capacitance. It's touchy to get power up to 29.5 MHz before
running out of RF TUNE range. Unless you NEED power up there, it's best to 'fudge' a bit on the
RF TUNE setting to favor the lower part of the band. Yes, you will have to increase the RF GAIN
on 15 and 10M, but as long as you reach the ALC 'plateau' in TUNE you have enough.
New sylvania 6JB6's should give you 130-135 W on 80, 130W on 40, 120W on 20 and 15, and 100-110W
on 10M, all in TUNE. More on CW. Obviously this expects a good 50 ohm load and "accurate"
wattmeter.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Steve Wedge wrote:
I suspect I may have either soft driver or final. Just acquired a really nice T-4XB from a
colleague on this reflector and it't a real gem. ten opened today, and I couldn't really get it
over about 60W output. Somehow, I'm thinking this isn't too abnormal and I can get 100W out on 15.
I seem to remember getting more out on my C-Lines in years gone by, but I may
be fantasizing.
Steve Wedge, W1ES/4
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