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L4B question

 

Got the solid state relay in my L4B this past week. Got her on the bench with my TR4C this morning. All cabled up
When I key the xcvr in cw the amp shows no power output. Plate current abou 100ma but can¡¯t be dipped and NO GRID current. It has HV
I suspect the relay but wanted opinions first
Yesterday when I hooked the xcvr to it there was no pass through. I cleaned the contacts on the relay and got RX through it now. i cleaned the N/O contact for rf in and out also.
But maybe the relay is bad? I cannot hear it pic
Will take bottom off soon and see if it actually picks when I key it

Ron W5sum
 

Ron, what's the SWR at your exciter when transmitting? Can you hear the relay pulling in?



Steve Wedge, W1ES

Time flies like an arrow.? Fruit flies like a banana.

Sent with Proton Mail secure email.

On Saturday, January 18th, 2025 at 10:22 AM, Ronnie Hull - W5SUM via groups.io <w5sum@...> wrote:

Got the solid state relay in my L4B this past week. Got her on the bench with my TR4C this morning. All cabled up
When I key the xcvr in cw the amp shows no power output. Plate current abou 100ma but can¡¯t be dipped and NO GRID current. It has HV
I suspect the relay but wanted opinions first
Yesterday when I hooked the xcvr to it there was no pass through. I cleaned the contacts on the relay and got RX through it now. i cleaned the N/O contact for rf in and out also.
But maybe the relay is bad? I cannot hear it pic
Will take bottom off soon and see if it actually picks when I key it

Ron W5sum
 

Ron,

Haven't followed this thread but had a couple of random thoughts.

Are you using the non-polarized PTT connector? ?Have you tried reversing it in case ?it is installed incorrectly?
You should not have any plate current with no grid current.

There are experts on the reflector that should be able to help you out.


73,

Evan, K9SQG

On Saturday, January 18, 2025 at 10:22:55 AM EST, Ronnie Hull - W5SUM via groups.io <w5sum@...> wrote:


Got the solid state relay in my L4B this past week. Got her on the bench with my TR4C this morning. All cabled up
When I key the xcvr in cw the amp shows no power output. Plate current abou 100ma but can¡¯t be dipped and NO GRID current. It has HV
I suspect the relay but wanted opinions first
Yesterday when I hooked the xcvr to it there was no pass through. I cleaned the contacts on the relay and got RX through it now. i cleaned the N/O contact for rf in and out also.
But maybe the relay is bad? I cannot hear it pic
Will take bottom off soon and see if it actually picks when I key it

Ron W5sum
 

Ron
Any update on your problem? I am having? a similar problem with no grid current.
?
Jake
 

Any. other symptoms? ?So far, could be a relay issue.

On Wednesday, February 5, 2025 at 09:04:56 AM EST, Jake KE8VGU via groups.io <jkprz3@...> wrote:


Ron
Any update on your problem? I am having? a similar problem with no grid current.
?
Jake

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