At 04:42 PM 10/8/97 -0500, you wrote:
>When a separate RX antenna is selected by the front panel switch, it seems
>from Yaesu's "Technical Overview" document that the RX antenna remains
>connected to the receiver front end even during transmit. .... (It's
impossible
>for me to see how things are supposed to work in the condensed, illegible
>front end schematic). I'm surprised they didn't disconnect the RX antenna
>line during transmit, with appropriate grounding.
Hi John:
I'm a happy "MP" owner since June, 1996. I was never able to resolve to my
satisfaction your questions (above). But, last winter I did several 160m
contest efforts with various receive antennas switched into the RX antenna
jack, including a 40m beam, 20 feet above the 160 transmit dipole, and a
crude beverage near the TX antenna. Didn't seem to hurt the front end.
Since then I've decided to take some precaution before firing up on 160
this season. I bought a pre-assembled "Front End Saver", a relay box that
disconnects and grounds the RX antenna input. It was described on p. 32,
February, 1997 CQ Mag. You can build your own, or order a board or
complete unit in a box, as I did, from C&S Engineering, N8BYI, in Ft.
Wayne. Chuck's email is: crlewis@gte.net.
Yaesu installed all the recent mods for me within the one year warrantee
period, for FREE, not including shipment to their service center in
southern CA. I not only recommend the radio (for contesting and DXing),
but Yaesu's service. 73, Ken N6RO
.
Ken Keeler Oakley,CA Tenor Banjo & Guitar
Devil Mountain Jazz Band, Jazz Nut Records
Tel 510-625-2707/9402 FAX 510-625-9403
Email: kenkeeler@jazznut.com
Web: <http://www.dixiejazz.com/dmjb.html>
Ham Radio: N6RO
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