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Author Topic: Another Gates BC1T on 75M  (Read 2113 times)
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w4ax
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« on: September 05, 2023, 07:33:48 PM »

Several weeks ago I asked for some information on conversion of the Gates BC1T to 75M. I didn't receive much information so I documented with pictures and text the conversion process that I used.

I'll be pleased to try and answer any questions. https://w4ami.org/macks-restoration-bc-1t

73,

Mack
W4AX


* Gates.jpg (553.77 KB, 1740x3762 - viewed 165 times.)
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73,

Mack
W4AX
KL7OF
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« Reply #1 on: September 05, 2023, 07:56:08 PM »

Wow Mack....I'm impressed...Nice Job.  Thanks for the detailed information with great pictures...Good Luck.  Steve
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W7TFO
WTF-OVER in 7 land Dennis
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« Reply #2 on: September 06, 2023, 08:23:11 AM »

Thanks so much for saving another Gates from the scrap yard!

Nice take on doing it, too.

73DG Wink
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Just pacing the Farady cage...
KA3EKH
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« Reply #3 on: September 06, 2023, 09:34:23 AM »

Great job, like that you used a auto transformer for the HV control . I did that with RCA that I built up for 160. Noticed you used a huge  (0.01) plate blocking capacitor in the PA, any reason? also you may want to look at second harmonic if you are still hitting the 833 hard. They wont require as much drive at 375 watts as it would at 1 kW.
Now if we can get someone who will do a dual 833 at forty.
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w4ax
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« Reply #4 on: September 06, 2023, 09:43:03 AM »

This plate blocking cap was standard in my Gates. I would think it would be easy enough to move this rig to 40m with a bit more work on the neutralization circuit. Let me take a break for a bit and I may think about doing that.

Vy73,

Mack
W4AX
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73,

Mack
W4AX
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