Bob -
Correct! I think Drake just overlooked the R-4 being parallel resonant when the "B" manual was
done. Probably lost in the day-to-day business staying IN business! :-)
Just for completeness, the 2-A/B are parallel, the 2-C is series.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-
Hi, Garey, et.al.:
Your explanation of the various crystals for the 4-line made me grab my Drake
4-line manuals and look through them. The circuits for all of the crystal
oscillators in the receivers, except the R-4, and the transmitters are
virtually, if not, identical. Those would use the ser
On Sat, 06 Aug 2011 11:02:33 -0400, Garey Barrell wrote:
>Once again, more than anyone wanted to know, but . I can't help myself!
>:-)
Not to worry, we learn stuff.
73
-Jim
--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT
Quick answer: Yes and No.
Yes, the same crystals will work in both, but are (or should really be)
different.
The R-4 BAND oscillator is a tube, and the crystals are probably (or should be) parallel resonant,
cut for a 32 pF parallel load.
The R-4A BAND oscillator is a bipolar transistor and
Quick question: Do the R4 and the R4A take the same crystals?
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I think I paid around $12.00 each some three years ago at JAN Crystals.
I'm sure it costs more by now. The neat thing is they have the crystal
specs on hand and you only have to say it's for a Drake (fill in the model
number). Unfortunately you have to wait 3 - 4 weeks for delivery. On the
other h
I've seen comments on the list about 4 Line crystals, and recommended
sources. I see them listed on eBay frequently.
What do the new ones go for?
I suspect they're custom by now, and the manufactures don't list
prices for them.
Thanks!
Dan, K8WV
Dan Ringer, K8WV
Morgantown, WV 26501
http
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