Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Steve -
The 2-B Passband tuner has three L/C bandwidths available.
0.5 kHz at -6 dB // 2.75 kHz at -60 dB
2.1 kHz at -6 dB // 7.50 kHz at -60 dB
3.6 kHz at -6 dB // 10.5 kHz at -60 dB
The R-4/A/B all have four L/C bandwidths.
0.4 kHz at -6 dB // 2.6 kHz at -60 dB
1.2 kHz at -6 dB // 4.8 kHz at -60 dB
2.4 kHz at -6 dB // 8.2 kHz at -60 dB
4.8 kHz at -6 dB // 20 kHz at -60 dB
The R-4C has two crystal bandwidths standard.
2.4 kHz at -6 dB // 4.2 kHz at -60 dB
8 kHz at -6 dB // 28 kHz at -60 dB (Roofing Filter)
Optional filters were available.
250 Hz at -6 dB // 600 Hz at -60 dB
500 Hz at -6 dB // 1000 Hz at -60 dB
1.5 kHz at -6 dB // 3 kHz at -60 dB
Optional filters in AM Mode ONLY.
4 kHz at -6 dB // 7.5 kHz at -60 dB
6 kHz at -6 dB // 10 kHz at -60 dB
The 2-BQ Q Multiplier is a VERY effective accessory for the 2-B. It
offers a variable bandwidth, tunable IF peaking filter for CW or a
tunable IF notch filter. The Heath Q Multipliers work just about the
same, since the circuit is almost identical. The QF-1 requires power
(available from the 2-B Accy Jack).
73, Garey - K4OAH
Atlanta
Drake C-Line Service Manual
<http://www.k4oah.com>
Steve Berg wrote:
Steve Berg <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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How do the 2B selectivity curves compare with the R4B curves? I'm new
to Drake equipment and thought that the 4 series used crystal filters.
A thread here now tells me that this is not the case. Also, how well
do the 2B receivers work with Q multipliers like the 2BQ and the
Heathkit series? I use my 2B with a Gonset GSB-100 exciter, probably
heresy on this list, but they work well together on both CW and SSB
from my limited experience.
73,
Steve WA9JML
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