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1 vote
1 answer
56 views

Swapping crystal from HF to VHF in a QRP tranceiver

1 vote
2 answers
66 views

A question about chassis mount SMPS mounting

3 votes
3 answers
73 views

Serial Inductors in Tuned Circuit - Elenco AM780K AM Radio Kit

7 votes
1 answer
156 views

Is there anything special about 4.9152 MHz intermediate frequency?

2 votes
2 answers
107 views

What simple methods are available to test a homebrew SSB transceiver on transmit?

1 vote
0 answers
58 views

How do I test if three turns are better than 4 turns?

1 vote
1 answer
164 views

What is a diode for in a JFET-based audio mute circuit?

2 votes
1 answer
159 views

MW AM reception improvements?

13 votes
5 answers
4k views

How can I add amplitude modulation to this transmitter?

8 votes
4 answers
1k views

LoRa radio transceiver for PtP mesh?

5 votes
2 answers
112 views

14dB insertion loss for bandpass filter acceptable?

1 vote
1 answer
493 views

How do I wire an external mic and speaker to the Yaesu FT-250R without using their adapter?

10 votes
2 answers
916 views

Why do we have to hand wind toroids?

3 votes
3 answers
781 views

Effect of paint / uv coating on velocity factor of PVC

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