[1000mp] Important question

[Mark Marsden]

Hi Pete, Yuri et al

I made similar protection units for contesting with MPs & Mk5. Using
stacked back to back PIN diodes it has been tested for intermodulation,
check out  http://granta.digital-crocus.com/RxProtect.php3 

73, Mark G4AXX


-----Original Message-----
From: 1000mp-bounces at mailman.qth.net
[mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Pete Smith
Sent: 05 December 2005 11:03
To: Yuri Onipko; All about Yaesu 1000mp
Subject: Re: [1000mp] Important question

When I set up for SO2R, I figured I needed to hedge against doing
something dumb, so I built a receiver protector that sits in the RX
OUT/RX IN loop on the Mark 5, and run always with the RX ANT button
pushed.  It uses a small pilot light bulb (1.5V 60 ma) in series as an
indicator and fuse, and back to back stacks of 3 1N914 diodes in shunt.
The first time I made the bulb light, I was glad I'd done it.

73, Pete N4ZR

At 10:14 PM 12/4/2005, Yuri Onipko wrote:



>> Well, I am not too surprised.  In my station my 20m harmonic from the

>> Mark
>5 on 40 is ~S7 with bandpass filters on both radiops - 80 feet is not a

>long way in terms of isolation.
>>
>>>
>> 73, Pete N4ZR
>>
>
>I have 80 and 160 m antennas very close to each other (within 20 feet
>probably) and I use BPF's on each radio. Still blew the front end on 
>one of the MPs Mark V (80 m ) while operating the other one barefoot on

>160... I just wonder if adding stubs would help?
>Thanks.
>
>Yuri  VE3DZ