Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Icom 7600 Driving a Hercules 2??




 
The AM Forum
November 15, 2019, 02:42:37 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Icom 7600 Driving a Hercules 2??  (Read 1656 times)
0 Members and 1 Guest are viewing this topic.
k6hsg
Member

Offline Offline

Posts: 50


« on: March 28, 2012, 08:24:47 PM »

I have an Icom 7600 which seems to be working well on AM with 30 watts carrier and I am thinking about using my
Ten-Tec Hercules 2 solid state 500 watt amplifier with it.  I would reduce the drive to get 100 watts carrier out of the Hercules which should give me around 400 watts peak?
Has anyone on the list done this and what do you all think?
Am I asking for trouble?
I am working slowly on a 2 813 rig from the 50's that I bought on ebay but it may end up in the estate sale before I get it running.

73, John
Logged

John,  K6HSG  Tucson, Arizona
w4bfs
W4 Beans For Supper
Contributing
Member
*
Offline Offline

Posts: 1295


more inpoot often yields more outpoot


« Reply #1 on: March 28, 2012, 10:10:47 PM »

I have run an Icom 765 to a metron 1000b amp .... the drive requirement varies with frequency (8W drive on 80 m --> 200W carrier, etc)

you may need the alc - voltage to be adjustable with the simple external V divider ckt to properly control the rig and keep audio clean
Logged

Beefus

O would some power the gift give us
to see ourselves as others see us.
It would from many blunders free us.         Robert Burns
Pete, WA2CWA
Moderator
Member

Offline Offline

Posts: 7689


CQ CQ CONTEST


WWW
« Reply #2 on: March 28, 2012, 10:23:05 PM »

On AM, I wouldn't connect any ALC line between the 7600 and the amp. You don't need it. Monitor your RF amp output with a scope. That's all you need running AM. For even better AM transmit "quality", especially if you use any type of outboard audio processing, use the direct modulation input on the ACC jack on the rear of the 7600.
Logged

Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
ke7trp
Contributing
Member
*
Offline Offline

Posts: 3659



« Reply #3 on: March 29, 2012, 12:47:14 PM »

You wont get a clean true AM signal unless you build the external ALC box and hook it to the icom.  Then, You can turn the 7600's power up and then adjust the ALC knob to set your carrier.  You can then get a fully modulated signal.  The Device is cheap and easy to build. 

I posted here about the external alc box

http://amfone.net/Amforum/index.php?topic=25323.0

To give you an idea of the difference.  I recently ran my Icom in the AM mode on the 15 meter band to W0VMC. I used a commander 2500E amplifier. Carrier was 200 and the most I could get was about 50% mod. I saw peaks of 450 or so on the Power master.  With the box switched on and the same 200 watt carrier, PEP was now 1000.  I had to back the audio down to get the scope right at 100%. 

C
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.242 seconds with 19 queries.