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KB7ZUT

@graybeardradio.bsky.social
136 followers 57 following 39 posts

Radio, radio, radio, radio with a pinch of (you guessed it) more radio.

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KB7ZUT @graybeardradio.bsky.social · 10/02/2025
Here is the basic formula for a loop inductance in free space (air is close enough)
Formula
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KB7ZUT @graybeardradio.bsky.social · 02/02/2025
Seeing double this morning… #Hamradio
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KB7ZUT @graybeardradio.bsky.social · 31/01/2025
Completed a 40M Direct Conversion Receiver for the Soldersmoke Blog challenge. Really nice audio as a bonus. #hamradio
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KB7ZUT @graybeardradio.bsky.social · 17/01/2025
The story of 1206 SMD parts. My new favorite book from Amazon. Lots of great adventures will start in those pages…
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KB7ZUT @graybeardradio.bsky.social · 15/01/2025
Franklin Oscillator oscillating. Nice and stable and holding 7.003MHz for a hour. Still needs shielding to prevent stray capacitance (ie my hands) from de-tuning it. #hamradio
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KB7ZUT @graybeardradio.bsky.social · 13/01/2025
Working on a new home for the Franklin oscillator. #hamradio
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KB7ZUT @graybeardradio.bsky.social · 09/01/2025
Living life in Smith chart “Forbidden Area.” #hamradio
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KB7ZUT @graybeardradio.bsky.social · 08/01/2025
Finishing up a 20dB RF amp for the 40m direct conversion receiver. Manhattan never looked so good. #hamradio #buildRFyourself
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KB7ZUT @graybeardradio.bsky.social · 03/01/2025
Homebrewed Elliptic band-pass filter for 40m. S21(blue trace) S11(yellow trace). Now on to the rest of the direct conversion receiver. #hamradio
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KB7ZUT @graybeardradio.bsky.social · 02/01/2025
Local MW Broadcast Station KIVA AM successfully distroying my 40m Homebrew direct conversion receiver's frontend with their monster signal into my vertical antenna. Time for new filter to eliminate them... #hamradio #deathToAM
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KB7ZUT @graybeardradio.bsky.social · 31/12/2024
Happy New Year’s Eve everyone. May the fireworks be outside and not from the back of your radio.
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KB7ZUT @graybeardradio.bsky.social · 30/12/2024
My wife just complimented me on my miniature wreaths, but was wondering why I was making them after Christmas. #hamradio
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KB7ZUT @graybeardradio.bsky.social · 26/12/2024
Oops...
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KB7ZUT @graybeardradio.bsky.social · 24/12/2024
Wishing everyone a wonderful Christmas holiday. I hope you find a New radio or RF toy under the tree!
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KB7ZUT @graybeardradio.bsky.social · 15/12/2024
Working on a bandpass filter design that will pass most of HF (2MHz -30MHz). Lots of value tweaking, but it's time to solder something up and see how it works. #HamRadio #AmateurRadio.
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KB7ZUT @graybeardradio.bsky.social · 09/12/2024
Colin, I use my Anker USB-C PD power bank with both 12V and 15V trigger cables. Works like a champ and I have no issues with noise from the switch-mode supply in the power bank.
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KB7ZUT @graybeardradio.bsky.social · 07/12/2024
A little Yaesu 817 surgery from the past. See if you can spot the problem... #Hamradio #Amateurradio
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KB7ZUT @graybeardradio.bsky.social · 06/12/2024
Advanced digital waveform capture
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KB7ZUT @graybeardradio.bsky.social · 03/12/2024
My dealer hit me up with a couple of dime bags. Even ships in discreet nondescript envelopes. And it's super pure product.
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KB7ZUT @graybeardradio.bsky.social · 01/12/2024
Working on my emergency "Bug-Out-Bag"
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KB7ZUT @graybeardradio.bsky.social · 29/11/2024
Joining the 0.18kW club...
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KB7ZUT @graybeardradio.bsky.social · 29/11/2024
The massive finals of the Yaesu FT-817ND. #hamradio #Yeasu #RF
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KB7ZUT @graybeardradio.bsky.social · 28/11/2024
Glamor shots of my P3ST 20m Transceiver #hamradio
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