* Replying to a msg in MYMAIL (Roy's Personal Mail)
Hello Ivy.
08 Aug 97 21:25, Ivy Iverson wrote to Roy Witt:
 II>> Thanks for the info.  I hope I can find good used crystals,
 II>> (which is why I keep mentioning it).  I am disabled and must
 II>> depend on Social (IN)Security, and $40 or so for crystals just
 II>> doesn't fit my budget.
 II>
 RW>> Pass the crystal formula along and I'll look in my junk box...
 II>
 II> Unfortunately, I didn't get a book with it, and it's been so long
 II> since I have worked with this type of calculation, (Broadcast
 II> Engineering school over 30 years ago)...  Well, lessee... (taking
 II> radio apart into about thirty-eleven pieces)...   |-}  (Squinting)
 II>
 II> As best I can read the stamps on the xtals:
 II>
 II> 440.300 uses a xtal marked 52.3625 - Almost exactly 27 X carrier
 II> frequency.
 II>
 II> 448.925 xtal is marked 53.4406. (Unsure of this one, almost
 II> impossible to read). - Almost exactly 27 X carrier frequency
Uhhhh. No, they're 8x carrier freq ñ10.7 IF freq...actually 8 x 53.3625 = 
426.9 - 440.300 = -21.4/2 equals -10.7?  What they do with double 10.7 IF's 
is beyond me.
 II> 445.300 uses a xtal marked 16.4925
 II>
 II> 443.925 xtal is marked 16.4416.
These are 27 times carrier, or in this case, reciever freq...
 II> There is also a 71855.00 xtal on what appears to be the xmit side of
 II> the board.
PLL reference freq..
 II> Hopefully this is enough to calculate the exact frequencies required.
 II> (Sorry, I wish I could go farther with it, maybe you can).
 II>
 II> What I need:
 II>
 II> Xmit: 449.175 and 449.100
 II>
 II> Rcv: 444.175 and 444.100
 II>
 II> PL comb (Both channels): 102.7
 II>
 II> I would sure appreciate it if you could find either pair,
 II> (444.175/449.175 is the most important).
Unfortunatly, California repeaters are upside down from midwest repeaters.  I 
remember now, while visiting my dad in Illinois, my repeater frequency was 
upside down from one where he lived.  At first I wondered why I was hearing 
someone on the input, but never anybody on the repeater..then "ping" the 
light bulb lit up...My repeater transmits on 449.125, theirs was 444.125..
So, all of my junk box xtals would be upside down for you...sorry..
 II> story for fear of moderation.  Do you have access to netmail?   :-}
I *AM* 1:202/909, there or .10
 II> BTW, do you happen to have an old straight key lying around gathering
 II> dust, (Preferably one with a shorting bar)?  If so, how much would you
 II>  want for it?
Yes, it's mounted on a heavy brass plate that's worth more than the key 
it'self...Unused since 1978, right after I passed my General...I'll see if I 
can find it..
... An expert is a little drip under pressure!
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