[ICOM] Icom 740 vs 751A

Sun Apr 1 07:49:54 EDT 2012

Hi John, I bought my 740 new in 1985 and my 751A new in 1990 so it has been awhile. Both are great radios but they are old and it can be difficult to get repaired although it can be done. The filter combinations on the 746 PRO are far superior to both radios. The notch and NB are much better as well. You can set up 3 bandwiths in each mode, ie SSB, CW AM, etc. I had mine set at 2.8, 2.4 and 1.8 for SSB.  On my 7410 it goes much further. Same bandwiths but now I have 3 roofing filters installed, 15khz is standard and I added the 6khz and 3khz which just plug in, no soldering. I find even when working in a SSB contest I rarely ever use the pass band tuning any longer as just swith down to 2.4 or 1.8 with the roofing filter set to 3khz really tightens the signal, it is amazing. Of course the DSP, NR on the 7410 is incredible and the auto notch takes out everything, NB really works well too. In todays market thye best bang for the buck is the 7410. I am
 sure dayton weekend the price will drop to near $1600. again, it would be a steal at that price. An alternative choice is the Kenwood 590, I tried it but the ICOM receiver is hotter and easier to setup, good luck, Gil

________________________________
 From: John G. <af5cc at fidmail.com>
To: ICOM Reflector <icom at mailman.qth.net> 
Sent: Sunday, April 1, 2012 12:16 AM
Subject: Re: [ICOM] Icom 740 vs 751A

Hi Gil,

I understand that the PRO has many more filter options, but how do the DSP 
based filters in the 746PRO compare in overall performance to a pair of 
cascaded crystal filters?

Trying to find out on another reflector about unobtainable parts in the 740. 
I think it is a fairly basic design that uses pretty common parts in it.

73 John AF5CC
----- Original Message ----- 
From: "gil Kellersman Jr" <gilkell13 at yahoo.com>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Saturday, March 31, 2012 10:45 PM
Subject: Re: [ICOM] Icom 740 vs 751A

John, I am sorry, just read your question. Here is my thought process. While 
the 740 was very good and the 751A was great there is the concern that you 
may not be able to find the appropriate parts to fix these old radios as 
ICOM no longer stocks many critical parts including critical IC, etc. The 
746 PRO was outstanding and had 35 filter positions so you would never buy 
ANY filters and they worked really great! When I saw the 7410 this was my 
chance to upgrade so I could avoid the back lite issues that the 746 has 
even though i never had an issue. I sold the 746 PRO for $1000. I bought the 
7410 on sale at HRO around Dayton weekend for $1600. That was a no brainer 
for me. I have not had any issues with the 7410 and it is light years ahead 
of the PRO with the DSP chip and features which is the same as on the 7600 
and higher series. Now it is learned that the 7410 and 9100 can accept 
firmware upgrades so my investment is completely protected. I run my
7410 with the Heil PR 781 mic and the Palstar SP-30H speaker and I have a 
winning combination. Good luck, Gil

________________________________
From: Larry Young <k4lxv at bellsouth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Sent: Saturday, March 31, 2012 6:24 PM
Subject: Re: [ICOM] Icom 740 vs 751A

John: Receiver performance is a very subjective thing. A good performing 
receiver to one person my not be good to another. For example. For cw 
contesting, performance at 2 khz may be very important , whereas an ssb 
operator knows that a strong station 2 khz away is going to have 3rd and 5th 
order splatter products anyway.Sensitivity is likely not an issue on any 
modern receiver, but frequency stability and PLL phase noise might be.Most 
knowledgeable hams know that a noise blanker is designed primarily to reduce 
inpulse type noise whereas a DSP noise reduction may resuce some of all 
three types of noise. You may want to study and garner information from 
various sources so you can make the most informed decision that best suits 
your type and style of operating.
Larry K4LXV

--- On Sat, 3/31/12, John G. <af5cc at fidmail.com> wrote:

From: John G. <af5cc at fidmail.com>
Subject: Re: [ICOM] Icom 740 vs 751A
To: "ICOM Reflector" <icom at mailman.qth.net>
Date: Saturday, March 31, 2012, 6:00 PM

Hi Gil,

How did the 746PRO compare to the 740 and 751A in terms of receiver
performance?

John AF5CC

----- Original Message ----- 
From: "gil Kellersman Jr" <gilkell13 at yahoo.com>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Saturday, March 31, 2012 9:55 PM
Subject: Re: [ICOM] Icom 740 vs 751A

I owned both the 740 and the 751A each for 10 years. The 740 was a great
radio but the 751A was far superior in almost every aspect and was one of
the best transceivers ever built. I then had a 746 PRO for 5 years and now
have the the 7410 which by far is superior to any of these radios in every
aspect.
go to http://www.eham.net/reviews/products/14 and check the reviews:

751a a perfect 5.0 with 94 reviews
740 is a 4.6, 30 reviews

Good luck, Gil

________________________________
From: Vladimir Sidarau <vs.lists at gmail.com>
To: ICOM Reflector <icom at mailman.qth.net>
Sent: Saturday, March 31, 2012 5:15 PM
Subject: Re: [ICOM] Icom 740 vs 751A

The two rigs are pretty much on par but the 740's receiver is perhaps
even better than the 751A because the 740 is a HAM-bands-only rig,
while the 751A provides general coverage. The rest is pretty much the
same. The NBs are just so-so.

If you have an experience with more modern rigs, it will be quite
annoying to see the 10 Hz tuning step and absence of computer control.
But everything depends of your interests, of course. Still, the 740 is
famous for its incredible receiver, first of all, due to its
outstanding sensitivity.

73,
Vladimir VE3IAE

---

On Sat, Mar 31, 2012 at 12:46 PM, John G. <af5cc at fidmail.com> wrote:
> I am looking at a fully loaded Icom 740 for what seems like a decent
> price. It has 2 CW filters, mechanical 3rd IF SSB filter, keyer, ect. For
> the price one might also be able to find an Icom 751A. How do the
> receivers compare in these two rigs? Is the 751A a much better rig than
> the 740? How does the NB in each one compare in taking out line noise and
> stuff like that?
>
> 73 John AF5CC
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Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html
----
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Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html 

----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html