2 years ago I built a 1 kw linear amplifier patterned after the Heathkit KL-1. A pair of 4-400 tubes in parallel. Except for some minor changes, it is a KL-1. I laid out the parts mostly in the same places and put the shields/dividers in the same places. Since I am not into CW, I left out some of the CW circuitry. However, it could easily be put in. Since I intended to drive it with a 100 watt transceiver, I used the input swamping circuit rather than the tuned input circuitry. I added an unun to better match the 50 ohm transceiver to the 4-400's grids. It runs class AB-1. I used 4 meters. I bought some aluminum sheet and had a local shop bend up a chassis and 2 dividers (have pix). I used a piece of 1/8" aluminum for the front panel (have pix). It is installed in a Heathkit DX-100 cabinet. I have pix of the front and back. It really looks cool. Write me if you would like pixs and a schematic diagram. It comes with all my notes and an original Heathkit KL-1 manual.
Due to bad health, I will never build the power supply to go with it. I have 90% of the parts for a power supply and 100% of the expensive parts, including a roll-around cabinet, a plate transformer, bridge rectifier, choke and HV capacitor for a 3kv plate supply and the transformer, choke, HV capacitor for a 1.2 kv screen supply. I was going to use 2 power supplies so I could put the plate current meter in the ground circuit of the bridge rectifier rather than use Heathkit's method of bringing the 3 kv up to a front panel meter. Also, there are line cord, Millen HV connectors, relays, fans, 20A circuit breakers, 240 VAC 20A line filter, misc ceramic feed-throughs, stand-offs, low voltage connectors, etc. Now the important stuff. I will take $500 for either the amplifier or the power supply components, or $750 for both. I cannot ship it, so it is pick-up in Simi Valley, CA or you make all the arrangements to have it picked up, packed and shipped. Thank you. Ed Richards K6UUZ ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
