Forum: Antennas
15-Jun-2020, 5:46 PM
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Replies: 33
Views: 93,297
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Forum: Antennas
15-Jun-2020, 3:34 PM
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Replies: 33
Views: 93,297
Yes
The 1st UHF transistor (BFG67)...
Yes
The 1st UHF transistor (BFG67) could be replaced with a BFG520.
It might lower noise figure a couple of tenths of a dB.
Prrobably need to retune.
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Forum: Antennas
14-Jun-2020, 7:21 PM
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Replies: 33
Views: 93,297
Yes, plus.
Channel Master and some other...
Yes, plus.
Channel Master and some other manufacturers have not provided accurate noise figure numbers.
Numbers often provided are quotes from transistor manufacturers specs.
There is more...
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Forum: Antennas
12-Jun-2020, 10:18 PM
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Replies: 33
Views: 93,297
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Forum: Antennas
12-Jun-2020, 10:06 PM
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Replies: 33
Views: 93,297
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Forum: Antennas
12-Jun-2020, 8:29 PM
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Replies: 33
Views: 93,297
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Forum: Antennas
12-Jun-2020, 4:55 PM
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Replies: 33
Views: 93,297
CM-0264 Preamp
Seems feasible.
Main item is additional balun.
PCB traces are already there. Need to cut an etch connecting UHF & VHF, etc. Probably have to solder in a small jumper.
Maybe touch up...
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Forum: Antennas
12-Jun-2020, 2:40 PM
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Replies: 33
Views: 93,297
Good morning Sev.
The CM 0064DSB has...
Good morning Sev.
The CM 0064DSB has a regular ferrite 300:75 Ohm balun at its input.
The core and windings are seen in the lower right of this image (near input terminals).
...
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Forum: Antennas
12-Jun-2020, 10:58 AM
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Replies: 33
Views: 93,297
Ferrite, Wavelength, etc.
Not clear how your choke balun is configured?
The choke balun does not make impedance transformation as regular 300:75 Ohm baluns would.
For example; two 300-Ohm antennas paralleled would...
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Forum: Antennas
11-Jun-2020, 2:00 PM
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Replies: 33
Views: 93,297
Thanks for the RE report.
Looks like you...
Thanks for the RE report.
Looks like you have several strong signal stations to choose from.
As you know, there are several other factors that affect received signal strength besides...
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Forum: Antennas
10-Jun-2020, 3:19 PM
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Replies: 33
Views: 93,297
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Forum: Antennas
1-Jun-2020, 7:48 PM
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Replies: 33
Views: 93,297
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