Drake TR4
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JOHNNY BE GOOD
- 4 PILL USER
- Posts: 28
- Joined: April 24th, 2007, 7:40 pm
- Real Name: John
- Radio: Kenwood 530
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Drake TR4
Can anyone tell me if there is a 11 meter mod for a Drake TR4 Thanks
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Night Crawler
- Wordwide & Qualified
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Re: Drake TR4
Change the 42.5mhz, 43.0mhz and 43.6mhz crystals going to V1 the 6EA8 converter after the vfo.
Change one,two or all three. If you leave one or two of the original crystals you will still retain part of ten meters. If all three crystals are changed the radio will have a total coverage of 1.5mhz on 11meters.
Each crystal will give 500kc of bandwith the frequency of the crystal used for the mixer will determine what part of 11 meters the radio will operate on. The frequency for the crystal will have to be calculated by reading the circuit description of the mixing scheme and following the block diagram.
Change one,two or all three. If you leave one or two of the original crystals you will still retain part of ten meters. If all three crystals are changed the radio will have a total coverage of 1.5mhz on 11meters.
Each crystal will give 500kc of bandwith the frequency of the crystal used for the mixer will determine what part of 11 meters the radio will operate on. The frequency for the crystal will have to be calculated by reading the circuit description of the mixing scheme and following the block diagram.
