Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Modifications to Kenwood TS820s reducing power output.  (Read 5575 times)
VK5FSJA
Member

Posts: 1




Ignore
« on: September 14, 2012, 02:22:57 AM »

Hi my name Bill Watkins (VK5FSJA) and I was given a Kenwood TS820s, but according to power output I will not be able to transmit on this radio due my license restriction on output. Could someone advise me on how the output can be dropped to 10 watts PEP to comply with my licence conditions? I can be contacted at williamjwatkins@bigpond.com for further info.

73s

Bill  Smiley
Logged
KA4POL
Member

Posts: 2039




Ignore
« Reply #1 on: September 14, 2012, 06:53:57 AM »

How far can you reduce by ALC?
Logged
KE3WD
Member

Posts: 5689




Ignore
« Reply #2 on: September 14, 2012, 07:45:30 AM »

A 9-volt battery wired to a potentiometer as a variable voltage divider, injected into the ALC socket of the rig should allow you to dial in output power.


73
Logged
W8JX
Member

Posts: 6144




Ignore
« Reply #3 on: September 14, 2012, 07:51:28 AM »

A 9-volt battery wired to a potentiometer as a variable voltage divider, injected into the ALC socket of the rig should allow you to dial in output power.

Needs to be negative bias
Logged

--------------------------------------
All posted wireless using Win 8.1 RT, a Android tablet using 4G/LTE/WiFi or Sprint Note 3.
AC5UP
Member

Posts: 3908




Ignore
« Reply #4 on: September 14, 2012, 08:45:31 AM »

A quick visit here:  http://www.radiomanual.info/KENWOOD.html

...will offer a free download of the service manual and documentation for many things Kenwood. I see the 6146 PA tubes in the TS-830 are wired in parallel so that opens the possibility of removing one tube if and when the radio is modified to the 10 watt level. Why would someone do that? A single 6146 can handle 10 watts with ease and the second tube becomes a good used spare. Just Sayin'..................
Logged

Never change a password on a Friday                
KG6YV
Member

Posts: 515




Ignore
« Reply #5 on: September 14, 2012, 10:37:50 AM »

If you join the Yahoo TS 520 820 630 830 group there are many people there who can help you.

Big and active Yahoo group.

Greg
Logged
KE4DRN
Member

Posts: 3730




Ignore
« Reply #6 on: September 14, 2012, 03:54:42 PM »

hi,

Many Kenwood Hybrid manuals are in pdf here no cost

http://www.n6wk.com/kenwood/

73 james
Logged
KE9PP
Member

Posts: 11




Ignore
« Reply #7 on: September 25, 2012, 08:10:52 PM »

FWIW, I may be wrong about this but I seem to recall that the 2E26 tubes are pin for pin, lower power equivalents of the 6146.  Remember I said I may be wrong so no flaming please.
Logged
AD4U
Member

Posts: 2174




Ignore
« Reply #8 on: September 29, 2012, 09:52:39 AM »

If you are operating SSB turn the mic gain down to where you get 10 watts PEP out.  If you are operating CW turn the carrier pot down to where you get 10 watts out.  Of course tune the rig up properly first.

Dick  AD4U
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!