[UK-CONTEST] FT1000MP MKV front end gone - help!

[Alex GM3ZBE]

Thanks Andrew,
I will check that out tomorrow.  Now that you mention it I had forgotten 
but I had exactly that problem with one of the attenuators in the 
FT1000D when I had a homebrew amp that was hot switching.
Thanks for reminding me!
Alex

On 21/02/2011 20:27, Andrew wrote:
> On 21/02/11 15:19, Alex GM3ZBE wrote:
>> Hi all,
>> I'm sure you SO2R guys must be very familiar with this problem.  I was
>> playing around with a new topband antenna and forgot my FT1000MP was
>> still connected to it's antenna, I transmitted on my other rig (FT1000D)
>> and it looks like I have knocked something out in the MP rx.
>>
>> My question is what is likely to have gone and how much of a job is it
>> to repair.  Or is it a back to Yaesu job?
>
> Alex,
>
> Is the receive down only when the attenuator is selected (maybe just 
> one, but possibly all three positions) or is it down when the ATT is 
> set to 0dB?
>
> I'm asking because I knocked out one of the surface mount attenuation 
> resistors in my MP when playing SO2R which, I think, was the 6dB pad. 
> However, if you look at the schematic, this is switched in series with 
> the 12dB pad so it really meant I lost 6dB and 18dB, but 12dB and 0dB 
> still works.  Try your attenuator in different positions to see if you 
> have _any_ receive.
>
> If it's not the attenuator, it's probably the first amp stage you've 
> taken out, but I don't have the schematic at hand to see which one it 
> is....
>
> Vy 73,
>
> Andrew AC6WI.
>
>

-- 

73 Alex, GM3ZBE ~~~ Kingdom of Fife ~~~ IO86lf ~
Member of:
De Montfort University ARS,
Kingdom Amateur Radio Society (KARS)
GMDX Group, CDXC, Aberdeen ARS
Previous callsigns GM8BYG, G3ZBE
Holder of GM4BRN club call http://www.kars.org.uk/

Remember..............It's only a hobby!
When the going get's tough..........take a nap!!
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