Kenwood TS830S no ALC in tune mode. - UK Vintage Radio Repair and Restoration Discussion Forum

carlos10 · 30th Jan 2023, 6:40 pm

hallo,
in tune mode i have no alc indication,
first is was intermittent, alc on a few bands,
now the alc indication is completely gone,
in tune mode the meter makes a small movement to the left of the zero mark,
the radio is still performing full output 100watts,
mayby there some quys who experienced the same symptomes....
carlos on6cn

Cruisin Marine · 30th Jan 2023, 6:46 pm

There are posts relating to this problem
https://cse.google.com/cse?cx=008872...h+this+website

HamishBoxer · 30th Jan 2023, 8:01 pm

Dirty processor switch a quick look revealed.

carlos10 · 1st Feb 2023, 8:33 am

No, it's not the processor this time, is there somewhere a description in pdf how TS830 ALC works?
Carlos ON6CN

murphyv310 · 1st Feb 2023, 9:16 am

Guaranteed it will be dry joints.
My very clean TS-830S had the same issue and other intermittent problems, all gradually sorted with so many dry joints found.

carlos10 · 1st Feb 2023, 9:57 am

ok, thanks reply, what do you mean with dry joints...
no indication of mike sig in alc mode as well
i have full rf output in usb/lsb
so mike is working ok , also full cw rf output
tested on other receiver
what does the relay on the rectifier unit...
carlos on6cn

murphyv310 · 1st Feb 2023, 3:49 pm

The soldering gets what is known as dry joints. Also I've come across soldered joints that have little or no flux and when prodded reveal a clean printed circuit land. This problem is now rearing it's ugly head on the TS-830S
Do you have the service manual? To identify the circuit area and what individual components do without it is impossible. To do the resoldering will require patience and time doing a little at a time and testing so any mistakes can be rectified, not really a job if you are less than confident.
Mine started to show problems after replacing the PA valves as items got disturbed inside.

HamishBoxer · 1st Feb 2023, 4:42 pm

I would always recommend a head magnifier when looking for dry joints,

carlos10 · 2nd Feb 2023, 6:43 pm

solved, it was rl1 , this one drive me nuts hi
carlos on6cn

G8UWM-MildMartin · 3rd Feb 2023, 11:43 am

Was that the 4-pole one on the AF Unit?

Unfortunately, Kenwood/Trio called all of the three different relays (ANT relay, Rectifier Unit relay and AF Unit relay) RL1.

30th Jan 2023, 6:40 pm	#1
carlos10 Pentode Join Date: Apr 2007 Location: Sint-eloois-winkel 8880, Belgium. Posts: 157	Kenwood TS830S no ALC in tune mode. hallo, in tune mode i have no alc indication, first is was intermittent, alc on a few bands, now the alc indication is completely gone, in tune mode the meter makes a small movement to the left of the zero mark, the radio is still performing full output 100watts, mayby there some quys who experienced the same symptomes.... carlos on6cn

30th Jan 2023, 6:46 pm	#2
Cruisin Marine Heptode Join Date: Jul 2018 Location: South Coast, UK Posts: 727	Re: ts830s no alc in tune mode There are posts relating to this problem https://cse.google.com/cse?cx=008872...h+this+website __________________ "Behind every crowd, there's a silver Moonshine" Last edited by Cruisin Marine; 30th Jan 2023 at 7:01 pm.

30th Jan 2023, 8:01 pm	#3
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,711	Re: ts830s no alc in tune mode Dirty processor switch a quick look revealed. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

1st Feb 2023, 8:33 am	#4
carlos10 Pentode Join Date: Apr 2007 Location: Sint-eloois-winkel 8880, Belgium. Posts: 157	Re: Kenwood TS830S no ALC in tune mode. No, it's not the processor this time, is there somewhere a description in pdf how TS830 ALC works? Carlos ON6CN

1st Feb 2023, 9:16 am	#5
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,207	Re: Kenwood TS830S no ALC in tune mode. Guaranteed it will be dry joints. My very clean TS-830S had the same issue and other intermittent problems, all gradually sorted with so many dry joints found. __________________ Cheers, Trevor. 2M0GZQ. RSGB, GQRP, WACRAL, K&LARC. Member

1st Feb 2023, 9:57 am	#6
carlos10 Pentode Join Date: Apr 2007 Location: Sint-eloois-winkel 8880, Belgium. Posts: 157	Re: Kenwood TS830S no ALC in tune mode. ok, thanks reply, what do you mean with dry joints... no indication of mike sig in alc mode as well i have full rf output in usb/lsb so mike is working ok , also full cw rf output tested on other receiver what does the relay on the rectifier unit... carlos on6cn

1st Feb 2023, 3:49 pm	#7
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,207	Re: Kenwood TS830S no ALC in tune mode. The soldering gets what is known as dry joints. Also I've come across soldered joints that have little or no flux and when prodded reveal a clean printed circuit land. This problem is now rearing it's ugly head on the TS-830S Do you have the service manual? To identify the circuit area and what individual components do without it is impossible. To do the resoldering will require patience and time doing a little at a time and testing so any mistakes can be rectified, not really a job if you are less than confident. Mine started to show problems after replacing the PA valves as items got disturbed inside. __________________ Cheers, Trevor. 2M0GZQ. RSGB, GQRP, WACRAL, K&LARC. Member Last edited by murphyv310; 1st Feb 2023 at 3:55 pm.

1st Feb 2023, 4:42 pm	#8
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,711	Re: Kenwood TS830S no ALC in tune mode. I would always recommend a head magnifier when looking for dry joints, __________________ G8JET BVWS Archivist and Member V.M.A.R.S

2nd Feb 2023, 6:43 pm	#9
carlos10 Pentode Join Date: Apr 2007 Location: Sint-eloois-winkel 8880, Belgium. Posts: 157	Re: Kenwood TS830S no ALC in tune mode. solved, it was rl1 , this one drive me nuts hi carlos on6cn

3rd Feb 2023, 11:43 am	#10
G8UWM-MildMartin Heptode Join Date: Jan 2004 Location: Stockport, Greater Manchester, UK. Posts: 815	Re: Kenwood TS830S no ALC in tune mode. Was that the 4-pole one on the AF Unit? Unfortunately, Kenwood/Trio called all of the three different relays (ANT relay, Rectifier Unit relay and AF Unit relay) RL1.