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G0TEZ > YAESU 12.12.04 12:23l 58 Lines 2484 Bytes #999 (0) @ WW
BID : 639_G0TEZ
Read: GUEST DK7JY
Subj: Re: FT290 Pluses.
Path: DB0FHN<DB0FOR<DB0SIF<DB0EA<DB0RES<ON0AR<ZL2BAU<ZL2BAU<GB7MAX<GB7SAM<
GB7OAR<GB7BOB<GB7HVU
Sent: 041211/2312Z @:GB7HVU.#16.GBR.EU #:61616 [Great Harwood] FBB7.00i $:639_G
From: G0TEZ@GB7HVU.#16.GBR.EU
To : YAESU@WW
G0TEZ/TPK 1.83 Msg #:639 Date:11-12-2004 Time:23:04 GMT
People have given warnings about not using the FT290 with AE removed.
As Jeff G4XNH says, it is in the manual.
The nice thing I noticed about the old FT290R Mk 1 which was old when I got
it was the protection against high SWR, probably with that telescopic AE in
mind.
The PA transistor is a 2SC1969, very familiar to someone who was still on
CB and had used the AM rigs.
The 2SC1969 is rated at 10W in Class A. It's maximum is 15W so, if you
have any sort of SWR problem with your masive 2.5W O/P, you are likely to
notice things going wrong long before the O/P transistor blows.
Crude and simple, probably quite cheap compared with complex SWR protection
devices.
I remember another 2m rig which actually used the 2SC 1941. This was rated
at even more power for continuaous use. Some of us would fit them as
standard in CB radios we repaired to give less chance of the PA blowing.
Most UK 'Legal' CB radios had a 4W PA and were limited, initially to 2W ERP
then 4W.
The thing that surprised me, of course, was that the 1969 and 1941 could be
used at VHF when we used them at 27MHz.
The truth probably lies in the stockists selling 'general purpose'
components back when people actually used to repair things.
If you could repair both your CB and PMR with the same transistor and AF
amp IC even use the PLL02 as a general purpose PLL IC, then the branch of
Radio Shack or equivalent, out in the sticks, didn't need to stock as
varied a collection of components.
The only equipment I have seen which was more rugged than rigs like the 290
was the old Soviet stuff which came through occasionally. A Russian
transistor with a 'cyldon' tuner. Rigonda with it's one valve for everything
- well almost.
Even in cars. I have driven a number of very reliable Rivas and Nivas, very
hard to break and running on paraffin to 5 star.
According to a sneering news item from Jeremy Clarkson, Lada is back.
They are exporting them again, a newer version.
I think Clarkson's main complaint was that the are too cheap.
He is no mechanic and certainly no driver, just a poser, so, I think I
would lash out #3K on a Lada even if it isn't a posermobile, for the same
reason I like my old FT 290 and no, there is never anyone on SSB or CW but,
at least it has the ability.
73 and Merry Yuletide, Ian.
p.s. Don't forget to clean the relay.
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