| Author |
Message |
    
BTJustice
| | Posted on Sunday, October 27, 2002 - 2:25 am: | 
|
I need the following frequencies for my Electra Bearcat III I am restoring...
155.415
153.980
157.450
155.340
155.055
39.500
159.210
453.250
I have the following crystals if anyone would like to trade 1 for 1...
33.940
33.940
39.7800
39.820
45.220
46.380
154.860
155.010
155.100 (48.10000)
155.250 (48.15000)
155.250
159.090
159.890 (47.69666)
162.475
453.500
If you have more than 1 of the crystals I need listed above, please let me know as I would like some spares also.
Thanks In Advance,
BTJustice |
DeadlyEyes
| | Posted on Sunday, October 27, 2002 - 9:05 am: |
|
You might try here for your crystals....
Jan Crystals
POB 60017
Fort Myers, FL
800-JAN-XTAL
813-936-2397 (in FL) |
DeadlyEyes
| | Posted on Sunday, October 27, 2002 - 9:05 am: |
|
You might try here for your crystals....
Jan Crystals
POB 60017
Fort Myers, FL
800-JAN-XTAL
813-936-2397 (in FL) |
Scrapiron63
| | Posted on Sunday, October 27, 2002 - 9:57 am: |
|
B.T., those frequencies you listed, are those what you want to receive, or is that the frequency for the crystals. The old bearcats use a reference crystal and some multiplication, I can't remember what it is. I've got a bunch of old scanner crystals, if you can give the actual frequency of the crystals you need, I will look thur them. scrapiron |
bruce
| | Posted on Sunday, October 27, 2002 - 10:41 am: |
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DE another i did a lot of bussenss with Sentrey Crystals in oka VERY good product I have crystals they cut for me that are 30 years old and still going!
http://www.sentrymfg.com/Specification%20Select.htm |
HoosierCardinal
| | Posted on Sunday, October 27, 2002 - 4:38 pm: |
|
Those crystals will cost you about 10 to 15.00 a piece! IMHO not woth the $$$. I found an old beacat scanner at a flea market once that the owner had 75.00 marked on it(he also had a 23 channel browning mark 2 for $500.00!!!) and i asked him if he would go lower. The guy got mad and said no. Every year i go back to that very same flea market and he still has those scanners! And he still wants the same amount of $$$ |
DE
| | Posted on Sunday, October 27, 2002 - 5:11 pm: |
|
Ol Hoos is absoluely correct. Over 20 yrs ago I paid 7.50 for a crystal and I imagine that given the cost of living increases that those crystals would probably have doubled in price.
With the new programable, trunking capable scanners with over 300 channels being very common place and for a very reasonable price I must take it hoos that the original poster is of the restoration group. And while you and I would probably just say junk and buy a new rad shack scanner well he probably gets much self gratfication by restoring the old equipemnt. Heck I even felt like a top service tech when I fixed the Pace 1000B to a very workable condition. It was broken and stored in my junk yard err err junk room.
Still sometimes ya got to go with the new and improved.
Later
DE |
bruce
| | Posted on Sunday, October 27, 2002 - 5:19 pm: |
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Your right last time i ordered they were about 15 bucks each ANOTHER reason im replacing older gear! |
307
| | Posted on Sunday, October 27, 2002 - 6:37 pm: |
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Email me direct , I have tons of them..
307 |
Bigbob
| | Posted on Sunday, October 27, 2002 - 7:04 pm: |
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307s got crystal heaven. |
HoosierCardinal
| | Posted on Monday, October 28, 2002 - 2:14 pm: |
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Problem is if you have your scanner programmed for your county and if you buy one out of your county then you need to get new crystals for that county you moved into or that you moved the scanner into! A pain in the posterior i say! |
BTJustice
| | Posted on Monday, October 28, 2002 - 3:29 pm: |
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Thank you all for the replies. I just e-mailed 307 about the crystals I need. I could buy a new scanner but it is just cool to get an old one going again. |
2ec837
| | Posted on Tuesday, October 29, 2002 - 2:09 am: |
|
For crystals check G & G Communications near Rochester NY.The last I knew they were $5.00 each.If I remember right you can use Regency crystals in Bearcat, but the Regency crystal would have to be 100 KHz higher.To hear 155.34 with a Regency crystal in a Bearcat, you would need a 155.44 crystal.
http://www.iinc.com/ggcomm/
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BTJustice
| | Posted on Tuesday, October 29, 2002 - 5:25 pm: |
|
I wonder if it would make sense to use Regency crystals in my Bearcat scanners as there are way more of them. Is that as reliable as the actual Bearcat crystals? Now these are the frequencies I want to monitor with my Bearcat III / IV...
155.415
153.980
157.450
155.340
155.055
39.500
162.400
159.210
453.250
Now if I want to get these through the use of Regency crystals, I would need (if I am doing my math correctly)...
155.315
153.880
157.350
154.955
39.400
162.300
159.110
453.150
Does that sound correct? If so, might anyone have any of those in Regency crystals they would want to get rid of?
Sincerely,
BTJustice |
BTJustice
| | Posted on Tuesday, October 29, 2002 - 5:38 pm: |
|
Forgot something. For 155.340 I would need a 155.240 Regency crystal.
Sorry,
BTJustice |
Buck
| | Posted on Tuesday, October 29, 2002 - 5:41 pm: |
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I think you need to go the other way...you subtracted 100khz.....you need to add 100khz
155.515
154.080
ect. |
ss8541
| | Posted on Tuesday, October 29, 2002 - 11:06 pm: |
|
you are definitely doing something wrong. NO rxer uses a mixing signal 100khz above or below. most of these scanners of this type use 10.7mhz as their offset/if freq. so you need a xtal that runs 10.7mhz below the carrier you are intending to rx. and this really isn't what the xtal is running at. to get that divide the carrier - 10.7 by 3. this gives you 3rd overtone of the xtal.
we will use your example for an example;
155.515-10.7= 144.815 this is the freq injected into the mixer with the 155.515, but it isn't what the xtal is running at. the xtal is running at 144.815/3= 48.2716mhz. it is run through a tripler to get the 144.815(48.2716x3=144.815) but at this freq(48.2716), it can only be a 3rd overtone xtal, not a fundemental freq xtal. this all is important when finding what you need.
i will admit that my experience with these dinosaur scanners is limited, but my experience with rf throughout the spectrum isn't nearly as limited. i have seen enough of these 'moses' scanners that i have realized how most of the regency scanners of this era worked. the older bearcat should be the same(but don't hold me to that). |
ss8541
| | Posted on Tuesday, October 29, 2002 - 11:54 pm: |
|
i didn't read this too well. i see now what you are saying. the regency is 10.7 and the bearcat is 10.8. so yes you will need to subtract 100khz if using the regency xtals in the bearcat.
all the rest written above is still the same for how these work, just plug in 10.8 for the bearcat instead of the 10.7 that i had used and then go from there.
oh, and my disclaimer still stands. i have only seen one or 2 schems on these scanners, and it was hard to decipher the hieroglyphics(just kidding). the rest i drew from personal experience of customers bringing them to me. |
2ec837
| | Posted on Wednesday, October 30, 2002 - 3:42 am: |
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http://www.iinc.com/ggcomm/xtalid.html
For info on crystal swapping look at the bottom of the page.
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ss8541
| | Posted on Wednesday, October 30, 2002 - 10:48 am: |
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in my opinion the info on the link is confusing if you don't understand how xtals works. if he just subtracts 100khz from the signal he is wanting to rx in the highband vhf area(150mhz), he will be in there like swimwear. of course this is only for using regency xtals in a bearcat. |
BTJustice
| | Posted on Saturday, November 09, 2002 - 2:11 pm: |
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ss8541: Yeah, that should work. I found out you have to add 100 khz for Low VHF and substract 100 khz for High VHF and UHF if you use Regency 10.7 IF crystals.
I am still without crystals though.
BTJustice |
