Hey guys,
I just want to reiterate what Ken said, John. It is IMPERATIVE that you
protect the front end of your radio when using the aux recieve input. I
think it is safe to say that you have been fortunate to his point not to
have done any damage. Believe me,it can happen...as my friend Jeff, W0XV,
found out when useing the aux input to his brand new IC775. His transmit
antenna was about 30 feet from the "recieve" antenna, and he turned on his
amp...Boom!, no more reciever. Cost him a bundle in time and dollars.
I also have the Front End Saver box from C&S. It's an easy kit to build or
you can buy the ready-to-go variety. It's the most inexpensive insurance
you'll ever buy. It also serves to key the amp after grounding the
recieve antenna plugged into the aux jack. I use it religiously with my
FT1000D.
Good Luck. Trust us on this one.
Larry N0XB
Northfield, MN
At 09:25 PM 10/8/97 -0700, Ken Keeler wrote:
>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
>
>--
>FAQ on WWW: http://www.qsl.net/k7on/yaesu.html
>Submissions: yaesu@contesting.com
>Administrative requests: yaesu-REQUEST@contesting.com
>Problems: owner-yaesu@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
--
FAQ on WWW: http://www.qsl.net/k7on/yaesu.html
Submissions: yaesu@contesting.com
Administrative requests: yaesu-REQUEST@contesting.com
Problems: owner-yaesu@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|