The "dire warning" was only an attempt to tell the poster -- examine why the
attenuator is there in the first place and make sure the person recommending
the mod knows what they are doing

Then make your choice.

--
The Anon Keyboard
I doubt, therefore I might be



"4nradio" wrote in message
news:KQLqd.485437$D%.205830@attbi_s51...
Hi Mike,

Despite the dire warnings of the other person who responded to your
request, I've done the MW attenuator removal for an IC-756Pro and it works
great to improve the trans-Pacific MW DX I hunt for. The attenuator is the
same in both the IC-756Pro and the IC-756Pro2, so I'm going to send you
files via email that should help you out.

In fact, I'll be performing this mod on a friend's IC-756Pro2 soon. He's
also a foreign MW DXer who bought the transceiver just for it's excellent
receiver section (like I did).

I need to give credit to Dallas Lankford (an electronics prof. at a
college) who figured out the mod. The file with the schematic was done by
Dallas, and I created the file which shows the component layout. I also
have Dallas' modification for enabling the preamp on mediumwave if you
want it (I have not done this mod, as I already have a high-IP3 Wellbrook
preamp inline after my antenna splitter).

Dallas Lankford is definitely not an inexperienced tinkerer; he's one of
the two most brilliant people in electronics that I know personally; the
other is my good friend Craig Siegenthaler at Kiwa Electronics.

All you need to do for the attenuator mod is to carefully remove one SMD
cap and one SMD resistor, and add a short jumper wire (I used wire-wrap
Kynar). The mod took me less than 1/2 hour to perform. It's supposedly
good for 10 or 11 dB gain.

The mod definitely helps the 756Pro series to hear weak MW DX better...
mine is now in a virtual tie for MW sensitivity with my modded R-75.

BTW, I use 450 ft. and 700-ft. Beverage antennas at home, and have found
no adverse effects from the mod, despite a number of S9+60db local
transmitters in the area. I live in a high-RF area near Seattle/Tacoma and
the trans-Pacific (and rarely European) mediumwave stations are still
heard here. The MW attenuator removal mod has helped, not hindered.

I've removed MW attenuators in an IC-R70, an R-75, and now a IC-756Pro. In
all instances my DX reception improved. The foreign MW DX on mediumwave is
often weak, and sensitivity is frequently a major issue. I've DXed these
foreign MW stations for 15 years, and have found this consistently to be
the case. Overloading & images have been rare with these receivers
as-modded, and if they do crop up and/or interfere, it's a simple matter
to add attenuation as needed, reduce the RF gain, or both.

Guy Atkins

Puyallup, WA



"Mike" wrote in message
om...

Hello all



I have been searching high and Low for a mod that removes the Medium

Wave band attenuator. If anyone out there knows a site please direct

me and e-mail me direct I would greatly appreciate it.

MIKE



First State