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Lower the screen voltage on the radio not the amp to lower the drive to the amp.

Pad the input to the final tube? Lot's of ways. Good luck. Listening on 10 on my 50 year old Siltronics 1011C. Memories from High school.

All- It's a grounded grid triode amplifier - three 3CX800A7s. Many thanks, -Mark [email protected]> wrote:

Any chance you could lower the screen voltage? Assuming it's a tetrode or pentode. A string of zeners?

All- I'm willing to accept the 3 dB on receive, although it is not great. I have a separate question on the Swan forum to see if there is an easy way to put an RF output adjustment on the radio. I

If you do use an attenuator, which I do here for one of my amps, you will have to find a way to bypass it in receive or you will have 3dB attenuation of the receive signal. Sent: Wednesday, November

All- Thank you for the information. I do not recall having a spectacular failure like that, but perhaps the person I loaned the amp to did. Regardless, it still appears to be working. Thank you for

FWIW, I have changed those series resistors on those amps quite a few times before. ?They are rather small resistors and are probably sacrificial to save the meter in a fault.? ?? Sent from the

Plate/Grid flash over. With a manual tune amplifier, a likely suspect is a band change and failure to tune the plate and load at low power. Another way is returning to from a break in operation then

All- I gave the amplifier a try tonight at very low drive, slowly working my way up to legal limit to ensure the meter did not peg to the right due to an incorrect resistor value. Everything seems

All- The PDF file here works for me. I have seen this manual before. It has no information on the ALO/metering board. Yes, there are two meters in the schematic, but my LK800a does not have the same

Mark- The link to the LK800 manual didn't work here, error says page no longer exists. Can you check to make sure it's displayed correctly in your post- some of us would like to obtain that manual.

Does this work? Bama Manual Archive <https://bama.edebris.com/manuals/ampsuply/lk800> Bob W4JFA [email protected]> wrote:

No, other than the one you showed which I already had.

All- I have an Amp Supply Company LK800A amplifier that puts out full power.? However, I noticed recently that it shows no grid current reading when transmitting on multiple bands.? This is odd

https://www.ebay.com/itm/176326971384?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D277109%2C276751%26meid%3D0fb69d5d1e604449b0612f85bf7e037e%26pid%3D101196%26rk%3D

Its you Joe. They work for me C ________________________________ Sent: Sunday, November 24, 2024 10:34 AM To: [email protected] <[email protected]> Subject: Re: [ham-amplifiers] Smoker

Those links you posted are inop. You might want to just insert those images into you post or attach them to your post. Joe - W7RKN

https://brillman.com/product/7mm-packard-440-ac-delco-spark-plug-wire W4DNR

Years ago I built a supply for a L4B amp. Someone on Ebay was selling the cables that Drake used. It has control wires plus the high voltage cable in one sheath. Mike