Re: Need Help with Amp Supply LK500ZC
开云体育There are burnishing tools for exactly this purpose.? Using finger nail files and files for this purpose is risky, as the potential damage of removing too much contact material is high. ? I have one of these:
Here are two more:
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? Burnishing tools have very fine almost invisible teeth.? Using a burnishing tool is a safe method for cleaning relay contacts.? Every radio amateur that works on equipment with open frame relays should have one in his tool kit. ? 73, Dave, w6de ? From: [email protected] <[email protected]>
On Behalf Of Louis Parascondola via groups.io
Sent: 30 November, 2023 22:56 To: [email protected] Subject: Re: [ham-amplifiers] Need Help with Amp Supply LK500ZC ? John, you just might have a worn out contact that switches bias on the antenna relay. ?If the contacts are severely pitted they might not make up too good
sometimes and other times ok. ?You need to inspect the that set of contacts in particular. ?If you carefully remove the rear spring on the relay you can lift the armature off and inspect all the contacts. ?The contacts that switch the RF can be cleaned gently,
the contacts on the bias may be in bad shape, there may be a tiny point on the armature contact and a tiny depression on the body contact. A gentle filing to remove the “pit” and a cleaning should restore reliable contact. ?It’s not unusual at all to see the
bias contact hood bad with the age of thst amp especially being used on CW a lot. ?Seen it quit often and by doctoring up the bias?contact that problem went away. ?Lou ? On Thursday, November 30, 2023, 3:58 PM, John Roland <johnroland51@...> wrote:
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