[1000mp] Mod's to ft1000mp

Wed, 26 Feb 2003 21:36:12 -0000

Hi Barry N1EU and readers.

The modification to noise blanker is appropriate to all the 1000 series
rig's ( not quite sure about the field )
The dual gate fet in the input to the noise blanker is still producing  some
gain ( guess abt 10/12db ) even though the blanker is switched off and front
panel level control fully anti clockwise.

Here are some voltage readings for your perusal

mod not fitted - tp2001 - noise blanker off front panel control anti cw =
1.26 volts.
                        -tp2001 - noise blanker off front panel control
clockwise = 2.56volts
                        - tp2001 - nb on,  front panel control clockwise =
2.56 v
                        -tp2001 - nb on, front panel control anti cw = 1.26
v

mod fitted - tp2001 - noise blanker off front panel control anti cw =
0.36volts
                  - tp2001 - noise blanker off front panel control clockwise
= 0.45volts

As you can see the first fet is capable of quite some gain when noise
blanker switched off without the mod as a electroncs engineer explained to
me !

Hope the above is of interest

73 es gd dx'ing  Graeme  G4CKH.
-----Original Message-----
From: Barry N1EU <[email protected]>
To: [email protected] <[email protected]>
Date: 26 February 2003 13:28
Subject: [1000mp] Mod's to ft1000mp

>It is my understanding that, unlike the FT-1000D, the FT-1000MP does not
>need the noise blanker mod (improved IMD) as long as you keep the noise
>blanker fully ccw when not in use.
>
>73,
>
>Barry N1EU
>www.n1eu.com
>
>
>
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