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Amplifiers (QRO) / Re: Heathkit Chippewa amplifier
« on: June 10, 2013, 04:40:47 PM »
More pics of the input circuit
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Amplifiers (QRO) / Re: Heathkit Chippewa amplifier
« on: June 08, 2013, 03:14:22 PM »
Ok, got it up and running today, ran just the filaments for about an hour then turned on the high voltage and keyed it with no drive in SSB mode and adjusted the idling plate current with the bias adjustment to 180 mA per the instructions and let it make heat like that for a couple of hours.
The tubes do have the blue glow so they are a little gassy, 1 is a little brighter blue than the other.
I put it in line and tuned up on 3.915 and slowly started bringing the power up over about an hour, 60 watts drive gives me about 1000 out, so far so good.
Here's a few more pictures with the cover off while I was bringing the tubes up.
The tubes do have the blue glow so they are a little gassy, 1 is a little brighter blue than the other.
I put it in line and tuned up on 3.915 and slowly started bringing the power up over about an hour, 60 watts drive gives me about 1000 out, so far so good.
Here's a few more pictures with the cover off while I was bringing the tubes up.
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Amplifiers (QRO) / Heathkit Chippewa amplifier
« on: June 06, 2013, 06:30:01 PM »
Hi All
I just acquired a Heathkit Chippewa amplifier from a good friend who had passed recently, this amp has not been fired up for nearly 20 years so this will be a fun project to bring this old beauty back on line.
Here are a couple of pictures of the unit and the power supply, I will post more as I clean it up and bring it online.
I just acquired a Heathkit Chippewa amplifier from a good friend who had passed recently, this amp has not been fired up for nearly 20 years so this will be a fun project to bring this old beauty back on line.
Here are a couple of pictures of the unit and the power supply, I will post more as I clean it up and bring it online.
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