[Yaesu] VL-1000Stock VS MODIFIED (HIGH POWER!!!)

Thu, 24 Jan 2002 19:34:21 -0500

If your Mark V will tune the antenna, so will the Quadra.

73 Bill K4SGF

----- Original Message -----
From: John Kjos W9RPM
To: [email protected]
Sent: Thursday, January 24, 2002 5:58 PM
Subject: Re: [Yaesu] VL-1000Stock VS MODIFIED (HIGH POWER!!!)

Hello, I am very interested in the readings about the Quadra. I have
been seriously looking at getting the amp. I am partially disabled so
the automated function is a big thing for me. I am happy with the
Ameritron AL-1500 and the converted SB-220 for 6 meters, but I am always
tuning. My question is can anyone of you give me help on the tuning
capabilities of the QUADRA. I have a Rotatable Dipole on 80M and I have
it tuned to 3650. Reason for that is that I do alot of operating on both
the CW portion 3505 and the DX window 3790. The SWR is 1.2 at 3650, but
it goes to 3.5 to 4 at 3505 and 3790. Anyone have an idea if the Quadra
will tune this? I have an external tuner now that works fine, but would
just as soon not have one if I got the quadra. My Mark V will tune this
if I engage it. Also, I use the FH-1 remote with my Mark V and it seems
that I will lose that function with using the Quadra. Thanks for any
help. 73 John W9RPM

[email protected] wrote:
>
> The MRF150 is available, and replacement/substitutes are also available.
> THOMPSON makes an interchangeable transistor, and there are still quite a
few
> origional motorola MRF150s available from RFparts and others, and although
> MOTOROLA has ceased making the part, its manufacture has not stopped, it
has
> been TRANSFERRED, anong with many of the other motorola high-power RF
> devices, to other manufacturers, who will continue to make the parts.--A
> stock QUADRA VL1000 amp will normall exceed 1,200 watts output if driven
by
> about 80 watts and no ALC control is used, however if operated in this
> manner, distortion products are likely to be much higher than at 1000
watts
> or less. The unit will operate with Non-YAESU radios, although it is not
> anywhere as convenient, because you will have to generate a carrier and
push
> the frequncy set button each time you change bands with a non-yaesu radio.
> If you use a YAESU radio, such as the FT-767, FT-757, FT-747, FT-890,
FT-900,
> FT-100,FT-990, FT-1000, FT-1000D, FT-920, FT-1000MP, or the FT-1000MPMK-V,
> you will find it a great joy to use, with fully automatic selection of
band
> and antenna, just as fast as you can push the button on the exciter!---I
own
> what is probably the worlds ONLY modified, FULL-POWER VL-1000 QUADRA amp,
my
> unit using 8 MRF151G transistors, and a modified, higher amperage (80
amperes
> max.) power supply.  MY unit is now capable of CW or FM power outputs on
HF
> EXCEEDING 2,500watts, and over 1,500watts on 6meters! It also sounds GREAT
on
> AM PHONE at the 1,500 watt Peak power level, running a carrier of 375
> watts.--When operated at the USA legal power of 1,500 watts output, it
never
> gets too hot to touch ANYWHERE inside, (Except for RF burn danger!) and
> operates with distortion levels as low as and in most cases LOWER THAN the
> stock unit.--The modifications involved were/are extensive AND expensive,
but
> I am glad I tackled the job, and I LOVE IT!!!--73s Bob Curry,
> KC3VO--(Motorcycle Bob, 1,500watts motorcycle mobile)
> _______________________________________________
> Yaesu mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/yaesu

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