[ICOM] 756 pro and ssb

[ve4xt at mts.net]

According to Mr. Heil, who designed the mic input for the PRO series of transceivers, all Icom PRO 
models have "righteous" (his word, appropriate for a contemporary of Joe Walsh) front ends and do not 
require, but can work with, the iC element.

It was the pre-PRO Icoms that had extremely low-gain mic inputs. My IC740 would NOT work at all, DC 
blocking cap or not, with my Heil BC10. The same BC10 worked FB with my 756 PRO and still works FB 
with my P III.

73, kelly
ve4xt




> 
> From: Walt Heilsnis - WB2VSJ <wb2vsj at earthlink.net>
> Date: 2009/01/07 Wed AM 09:31:19 CST
> To: ICOM Reflector <icom at mailman.qth.net>
> Subject: Re: [ICOM] 756 pro and ssb
> 
> What meter are you using to read power?  The Icom meter, an external watt meter?  *Most* meters 
read avg pwr, that may be why you are seeing 100% on the continuous tone and lower on normal 
speech. Internal meter behavior will vary quite a bit between rigs. Normal speech is all over the map so 
75% may be pretty good in your case.
> 
> Does your Heil set have the Icom element??  Here's a snippet from the heil website:
> To accommodate the low-gain Icom designs, Heil Sound developed a high-quality condenser 
element, called the "iC" in our products designations, that provides the optimum frequency response, 
impedance, and (most importantly) sufficient gain to drive these earlier rigs. The "iC" element also 
works tremendously well with the "modern" types of Icom rigs, making it an ideal all-around 
microphone. This element is found in products including the iCM base station microphone, the Handi 
Mic iC, the Pro Set iC, Pro Set Quiet Phones iC, Pro Set Plus iC, BM-10 iC, the Traveler series, and the 
Classic iC.
> 
> Find a peak reading watt meter like the LP-100a and it'll let you know what's really happening.
> 
> 73, Walt - WB2VSJ
> 
> -----Original Message-----
> >From: ww3s at zoominternet.net
> >Sent: Jan 7, 2009 9:48 AM
> >To: ICOM Reflector <icom at mailman.qth.net>
> >Subject: [ICOM] 756 pro and ssb
> >
> > 
> > I recently purchased a IC-756 Pro and it seems to work great on cw
> >and rtty, not sure about SSB. I'm using my Heil Proset, and the
> >adapter without the cap. I've set the bass to -2db and the treble
> >to+5 db, as some suggested. I've tried both the narrow and mid
> >compression settings. I just don't seem to be getting out. I can only
> >get to about 75% on the power out meter, ALC and compression seem
> >fine. Using the monitor function, the audio sounds ok. Is 75% typical
> >to read on the meter? If I inject a tone, I can get 100%. In using the
> >radio, I just don't seem to be getting out like I did with my TS-850.
> >Just asking if this is typical with an Icom, as with my Kenwood, I
> >could get near full scale power on voice peaks. 
> >----
> >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/
> 
> ----
> 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/
>