From: George KB2Z 
Subject: Re: [drakelist] Needed: 13.6mc R-4 x-tal

>>preselector at 0,,, adjust the 4,,, 3.5M caps. for max s-units
>>         Maybe using a harmonic for sensitivity?
>>Step 4, Set xtal to NORM, preselector to 3.9 adjust T-1 through T-4 for 
>>max s-units.
>>Steps 1, 2, 3, seem to be a preparation for tuning T1/T4 in step 4.
>>Step 12 has you retune the 4 caps for the 3.5 band in NORM pos.
>>When it gets to the bottom of the page (35) for peaking the 4,  1.5/3.0 
>>caps, step 13,  It instructs you to use that 13.6 xtal with the 
>>preselector at 6.
>>Page 35 has you use the 13.6 xtal to tune 2.5 WWV to adjust the 100kc 
>>osc.. That's the only part of that xtal that is straight forward.
>>I want to do this right, but it seems that skipping the first 4 steps 
>>(T-1/T-4) would be the sensible thing for me  to do. The rx works good, 
>>but I know it could work better.
>>As always thanks all for the advise and guidance,  George KB2Z
>>
>>
>>
>>At 09:41 PM 2/7/04 -0600, you wrote:
>>
>>>Hi George,
>>>
>>>Think you mean a 12.6 MHz for 160m?  I just ignored the 160m
>>>alignment procedures on my R4A and had no trouble without it.
>>>
>>>I'm pretty certain all the R4/T4/TR3/TR4 series use series resonant
>>>3ed overtone HC6/U crystals.  The +/- 50 ppm standard tolerance
>>>seems to work fine for me.  I've had to replace a few in TR3/TR4
>>>that were WAY off frequency.  I'd be wary of buying any old
>>>crystals even though I haven't seen this in R4/T4's.  I've had good
>>>luck with Petersen Radio for new "rocks" and received stuff the
>>>same week I ordered them.  I just email him exactly what I want
>>>and typically get the crystals way before I get the bill.  So far
>>>they have been dead on freq., fast and I like doing business in
>>>that manner.
>>>
>>>73,
>>>- Mark K9MRK
>>>----------------------------------------
>>>
>>>Petersen Radio co., Inc.:
>>>Jjk51503{at}aol.com
>>>
>>>Drake 4 series spec.:
>>>HC6/U holder
>>>3ed overtone
>>>Series resonant
>>>+/- 50 ppm tolerance (std.)
>>>---------------------------------
>>>Thank you for the inquiry.  The crystals are $11.00 each plus $3.50 
>>>postage for up to 5 crystals.  Delivery is usually 2 - 3 weeks
>>>and payment may be made by check or money order upon your receipt of the 
>>>invoice.  If you want to order, I need to know the type of
>>>holder that you need and your mailing address.
>>>
>>>
>>> > Good evening all,
>>> >
>>> > Would anyone have a spare, "13.6 mc parallel
resonant third overtone
>>> > crystal designed to operate into circuit capacity of 32 pf"?
>>> > I need one to align an R-4 per the manual.
>>> > Is there a work around to peak it without the crystal?
>>> > I can order a new  one if needed.
>>> >
>>> > Thanks in advance, George KB2Z
>
>
>
>
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