Hi Mark,
In my original post that's the reason I asked if there was a work around for the alignment.
The rx has a 12.6 xtal installed.
Per the manual, (p.32 alignment instructions) 13.6 mc x-tal required. The manual I have is from BAMA, but I checked it against the one at WB4HFN. http://www.wb4hfn.com/DrakeManuals/R4/Manual_R4.htm
Page 34, steps 1, 2, 3 says to use that xtal with Band at 3.5 and 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.: [EMAIL PROTECTED]
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
---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
--- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.580 / Virus Database: 367 - Release Date: 2/6/04
--- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.580 / Virus Database: 367 - Release Date: 2/6/04
