Hi,

I mostly do MW listenign/dx'ing. I would be interested in feedback
on how well the R75 performs on MW. I know there are Kiwa mods to
increase the MW sensitivity. Are these really necessary? Is the
difference that dramatic?

Well anyway, I would be interested in any user input on the R75.

Thank you
Russ K3Pi

"radiok3pi" wrote in message
om...
Hi,

I mostly do MW listenign/dx'ing. I would be interested in feedback
on how well the R75 performs on MW. I know there are Kiwa mods to
increase the MW sensitivity. Are these really necessary? Is the
difference that dramatic?

Well anyway, I would be interested in any user input on the R75.

Thank you
Russ K3Pi

Hiya... I have an R-75 and I like it quite a bit, but not for MW. It is
sensitive enough and works just fine on most MW, but if you want to DX a
weak MW signal I find that the R-75 is too noisy. Way too much snap crackle
and pop. I use a GE SR-III for MW DX'ing. Because it is analog it is quite
as can be. The draw back is that the tuner dial is not accurate at all.
I've read/heard that the CC Radio Plus is better then the GE-SR series
because it has an accurate tuner. It may not be as sensitive as the GE-SR
III or as quite, but it is probably one of the best MW radios available. I
also know that there are a lot of people that use old analog tuning
automobile radios as their MW DX'ing radio but I wouldn't know about which
ones to use or how to get them...

So... For MW, you have way better choices then the R-75. The R-75 shines
for sw utility and sw DX'ing using ssb and ECSS tuning, but it isn't
regarded as a MW radio.

Hope that helps...

--
Respectfully,

Michael

Location: New Jersey
Primary Receiver: R-75 with full Kiwa mods
Antennas: G5RV, 200ft "Frankenstein" roof wire
Additional Radios: 7600GR,KA-1101,KA-1102
PL-550, KA-989, Info-Mate 837, GE-SR III
Westinghouse H-104 (seven tube)
Web Site: http://md_dxing.tripod.com

In article ,
Michael wrote:
....
and pop. I use a GE SR-III for MW DX'ing. Because it is analog it is quite
as can be. The draw back is that the tuner dial is not accurate at all.
I've read/heard that the CC Radio Plus is better then the GE-SR series
because it has an accurate tuner. It may not be as sensitive as the GE-SR
III or as quite, but it is probably one of the best MW radios available. I
also know that there are a lot of people that use old analog tuning
automobile radios as their MW DX'ing radio but I wouldn't know about which
ones to use or how to get them...
....

Here's a suggestion, hit a swap meet (or ebay) and get 1) rf signal
generator and 2) a (digital) frequency counter. When you're lost on
the SR-III, (turn on and) adjust the generator (with the counter hooked
up and working) until you get a heterodyne and then just read out the
frequency.

The same thing could be done with a second receiver with a digital readout
using the local oscillator, remembering to compensate for the IF offset.
I can do this with my R-1000 because is leaks a signal 455 kHz above
the received frequency. (It's not the LO, as the R-1000 first IF is
45.something MHz. It's the signal used to drive the digital readout.
The frequency synthesizer board in the R-1000 is pretty baroque).

Mark Zenier Washington State resident

Don't know if anyone mentioned removing the R-75's mw attenuator, which should
help make the R-75 more amenable as an mw dx tool. Antenna orientation is a
factor, also. Have a 130 ft. of 16 gauge wire, ground terminated for a
beveredge effect. Is most efficient bringing in Bay Area & SoCal am'ers. But
it's a bit deaf snagging Denver's flamethrower KOA , however.

= = = (elg110254) wrote in message
= = = ...

Don't know if anyone mentioned removing the R-75's mw attenuator,
which should help make the R-75 more amenable as an mw dx tool.
Antenna orientation is a factor, also. Have a 130 ft. of 16
gauge wire, ground terminated for a beveredge effect. Is most
efficient bringing in Bay Area & SoCal am'ers. But it's a bit
deaf snagging Denver's flamethrower KOA , however.


FO&A,

MESSAGE #3080 - Icom IC-R75 eGroup on YAHOO !
"Here is a a file for Pete Gianakopoulos' Advanced MW Attenuator
Bypass Mod. it includes Pete's text plus a color coded schematic
and a matching PCB picture. i have not done the mod but have
been asked numerous times for help. as such i do not have an
"after" shot... if you have one it would be much appreciated!
- - - regards, phil "

Pete Gianakopoulos' MW Attenuator Bypass Mod:
http://groups.yahoo.com/group/icomr75/files/Phil%27s%20Shack/PeteGMod.pdf

Check-Out the Icom IC-R75 eGroup on YAHOO ! for more R75 Info.
ICOM-IC-R75= http://groups.yahoo.com/group/icomr75/

~ RHF
..

"Mark Zenier" wrote in message
...
In article ,
Michael wrote:
...
and pop. I use a GE SR-III for MW DX'ing. Because it is analog it is
quite
as can be. The draw back is that the tuner dial is not accurate at all.
I've read/heard that the CC Radio Plus is better then the GE-SR series
because it has an accurate tuner. It may not be as sensitive as the GE-SR
III or as quite, but it is probably one of the best MW radios available.
I
also know that there are a lot of people that use old analog tuning
automobile radios as their MW DX'ing radio but I wouldn't know about which
ones to use or how to get them...
...

Here's a suggestion, hit a swap meet (or ebay) and get 1) rf signal
generator and 2) a (digital) frequency counter. When you're lost on
the SR-III, (turn on and) adjust the generator (with the counter hooked
up and working) until you get a heterodyne and then just read out the
frequency.

That is a nifty idea.... I wish they would just make the thing accurate ....

Michael

Mark Zenier wrote:

Here's a suggestion, hit a swap meet (or ebay) and get 1) rf signal
generator and 2) a (digital) frequency counter. When you're lost on
the SR-III, (turn on and) adjust the generator (with the counter hooked
up and working) until you get a heterodyne and then just read out the
frequency.

You can buy a digital frequency display which will work with most any
shortwave or MW (AM) receiver from the following website. Price is about
$60.

www.aade.com


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starman ) writes:
Mark Zenier wrote:

Here's a suggestion, hit a swap meet (or ebay) and get 1) rf signal
generator and 2) a (digital) frequency counter. When you're lost on
the SR-III, (turn on and) adjust the generator (with the counter hooked
up and working) until you get a heterodyne and then just read out the
frequency.

You can buy a digital frequency display which will work with most any
shortwave or MW (AM) receiver from the following website. Price is about
$60.

www.aade.com

I figured Mark was suggesting a roundabout method because he figured (or
knows from experience) that connecting a frequency counter to the radio
may cause garbage to appear. If I recall, he was replying to a comment
that the Superradio had an advantage in not having any digital circuitry.

I suspect adding a frequency counter may result in digital noise appearing
in the radio, especially since the Superradio is indeed a very cheap and
unshielded radio.

I was going to suggest a crystal calibrator (with digital dividers, one
can get down to 10KHz and count them, yet use a higher frequency to get
the 100KHz points), but then I remembered that it might be more difficult
counting the points without a BFO.

Michael

Michael Black wrote:

starman ) writes:
Mark Zenier wrote:

Here's a suggestion, hit a swap meet (or ebay) and get 1) rf signal
generator and 2) a (digital) frequency counter. When you're lost on
the SR-III, (turn on and) adjust the generator (with the counter hooked
up and working) until you get a heterodyne and then just read out the
frequency.

You can buy a digital frequency display which will work with most any
shortwave or MW (AM) receiver from the following website. Price is about
$60.

www.aade.com

I figured Mark was suggesting a roundabout method because he figured (or
knows from experience) that connecting a frequency counter to the radio
may cause garbage to appear. If I recall, he was replying to a comment
that the Superradio had an advantage in not having any digital circuitry.

I suspect adding a frequency counter may result in digital noise appearing
in the radio, especially since the Superradio is indeed a very cheap and
unshielded radio.

I was going to suggest a crystal calibrator (with digital dividers, one
can get down to 10KHz and count them, yet use a higher frequency to get
the 100KHz points), but then I remembered that it might be more difficult
counting the points without a BFO.

Michael

The digital displays like those from aade.com have buffered inputs to
isolate them from the receivers oscillator. If the display is connected
properly to the receiver, there shouldn't be any noise problems.


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http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
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wrote:


Hi,

I mostly do MW listenign/dx'ing. I would be interested in feedback
on how well the R75 performs on MW. I know there are Kiwa mods to
increase the MW sensitivity. Are these really necessary? Is the
difference that dramatic?

Well anyway, I would be interested in any user input on the R75.

Thank you
Russ K3Pi



I assume you're looking for a desktop radio.

I think you can do better than an R75 for MW.

Get a Drake R8B if you can afford it. It's got an excellent synch detector. If
price is an issue, the Palstar R30 is supposed to be a superb (albeit no bells
or whistles) MW radio for it's price, which I believe is cheaper than an R75.

Excluding mega-buck military or maritime radios, the legendary Drake R7A is, in
my opinion, the BEST solid-state MW DX radio ever made. If you can find a used
one in good condition, grab it. I have one, and will NEVER part with it.