Karl's Crystal page

Introduction

"Channel element" is a term used for a frequency determine device for most LMR transmitters and receivers. Inside this element is the actual crystal. The other components may be circuits for temperature compensation and modulation methods. In the past companies would take your element, build a new crystal on the frequency you wish, installed and compensate the whole element so it works as well as OEM. It's believed all companies stopped offering this service and only will supply the actual crystal. Because of doing this one has to take a "chance" that the new crystal will work satisfactory. The Author is going on-going search for a company that still does compensation. One of the old companies (vendor) for the Author was I.C.M. Here's a capture off their (old) web site on the service:

Here's some engineering notes from ICM:

 

 

 

Here's what ICM used to provide:


CRYSTALS & CHANNEL ELEMENTS


Reconditioned Channel Elements, TCXO's & OCXO's

Call Sales for pricing and availability at 800-725-1426

ICM has been recrystalling OEM channel elements, TCXO's and OCXO's for over 20 years. Our services include not only changing the crystal frequency but full temperature compensation (when possible and required by the customer).

ICM can supply reconditioned elements or TCXO's for many types of Motorola, GE, RCA and other brands.

Service performed by ICM

All elements processed by ICM, including those supplied by the customer, are tested for proper operation. Each unit is tested for both RF output and zero ability before and after temperature compensation performance check. Where possible, compensation components are adjusted to the OEM Specification. Channel Elements that are directly modulated, or voltage controlled (vcxo, vctcxo, and vcocxo), are checked in a test fixture to ensure proper delta F. under loaded conditions.

If a customer supplied element is received that has a defect, such as a broken trimmer, it's repaired at a nominal cost. If the element has been damaged beyond repair, it will not be accepted for frequency change, and will be returned with no action taken.

Production times vary depending on element/oscillator type and other variables. An expedite service is available. Contact ICM sales current production times and pricing.
Oscillator Module Service

ICM can recrystal customer supplied oscillator modules (channel elements) used in most modern commercial two-way communications equipment. The service we offer includes the following steps:

A. Testing the element upon receipt
B. Removing existing crystal
C. Installing new crystal
D. Checking RF output and trimmability (where applicable)
E. Zeroing to center frequency (where applicable)
F. Testing for accuracy over specified temperature range (where applicable)
G. Relabeling element for new frequency

The oscillator modules (elements) are checked for proper operation when received. If repair is needed (transistor, capacitor, etc.), it will be replaced at a nominal charge. An oscillator that has been damaged and/or unrepairable will not be accepted for frequency modification, and will be returned to the customer with no action taken.

After the new crystal has been installed, the module is tested for nominal frequency and trimmability at room temperature, overall frequency specifications over the specified temperature range and RF output. If the module uses a compensation network, ICM will make adjustments necessary to insure that the frequency drift due to temperature does not exceed the original manufacturer's tolerances. Some modules have the crystal and a few compensation components only, not the entire oscillator assembly; in these cases the unit is spot checked using an oscillator of the required type. In addition, some modules such as offset type units are actively modulated; these units are set up on a test fixture and tested to insure proper deviation.

ICM will evaluate questionable modules for proper operation and supply a written report of condition for a nominal fee.

For pricing and delivery of complete channel elements modules (TCXO's) refer to ICM channel elements brochure or contact ICM Sales Department.

Oscillator module recrystalling can be performed utilizing ICM's "EXPEDITED" service. Call or write ICM Sales Department for pricing and delivery times.

Warranty
New and reconditioned elements/TCXO's supplied by ICM are warranted for an unlimited time on the entire element, except where obvious physical damage or user caused damage has rendered circuitry or components inoperable.
Note: The ICM stock of reconditioned elements changes daily. We cannot guarantee that all types are available at all times. Please contact ICM Sales concerning availability of type and quantity of element needed.

4EG28A17 RX (30-36) +20/3 Sicom 020700
  RX (42-50) +20/3 Sicom 023010
4EG28A18 RX (30-36,99) FC+20/3 Sicom 023000
  RX (37-50) FC+20/3 Sicom 023001
19A129393G(XX) TX EC,5C (25-54) 020620
  TX 2C 023830
19A129393G(XX) RX (25-30 & 36-42)EC,5C+11.2/3 020630
  RX (25-30 & 36-42) 2C 023831
19A129393G(XX) RX (30-36 & 42-50) EC,5C+9.4/3 020640
  RX (30-36 & 42-50) 2C 023832
19A130283G2 RX (36-42) 023875
19A137763G(XX) TX EC,5C (25-54) 023650
  TX 2C 023833
19A137763G(XX) RX (25-36 & 42-50)EC,5C+9.4/3 023660
  RX (30-36 & 42-50) 2C 023834
19A137763G(XX) RX (25-36 & 42-50)EC,5C+11.2/3 023835
  RX (30-36 & 42-50) 2C 023826
19B206175P1,P11 TX (25-35.9) 020480
19B206175P2,P3,P21,P31 TX (36-54) 020470
19B206176P1,P2 RX (25-42)+5.26/3 020540
19B206176P3 RX (42-54)-5.26/3 020550
19B206275P1 TX (25-50) 020570
19B206576P1, P2 RX (25-42)+5.3/3 020510
19B206576P3 RX (42-54) -5.3/3 020520
19B206576P10,P11,P12 RX (25-54)+12.4/3 020530
19B226962G1,2,3 TX (25-54) 5PPM 023011
19B226962G10 RX (30-36) +9.4/3 023360
19B226962G11 RX (36-42) +11.2/3 023370
19B226962G12 RX (42-50) +9.4/3 023380
4EG28A26 RX (150.8-174)-23/9 Sicom 023866
4EG36A10 RX Use 4EG28A11  
4EG38A13 RX Use 4EG28A15  
4EG38A14 RX -20/9 Sicom 023470
19A129393G(XX) TX EC,5C, (138-174) 021410
  TX 2C 023480
19A129393G(XX) RX EC,5C-11.2/9 021420
  RX 2C-11.2/9 023490
19A130283G1 RX 2PPM 023869
19A130283G3 RX 2PPM+11.2/9 022972
19A130605G(XX) TX EC,5C (150-174) 023450
  TX 2C 023640
19A130605G(XX) RX -11.2/9 023460
19A137645G1 RX MPR -21.4/2 023730
19A137646G1 TX MPR (138-174) 023720
19A137763G(XX) TX EC.5C (150-174) 023560
  TX 2C 023700
19A137763G(XX) RX EC.5C 023570
  RX 2C 023710
19A701562G6 TX Delta (150-174) 023800
19A701562G6 RX Delta 023810
19A702375G2 TX MPI 023864
19A702375G1 RX MPI 023865
19B206175P6,P7,P70 TX (150-174) 021230
19B206204P1 TX   021310
19B206221P1 RX -10.7/3 (132-174) 021320
19B20621P11 RX RCC only +10.7/3 021330
19B206576P4, P5 RX -5.3/9 021240
19B206576P8, P9 RX -12.4/9 021260
19B226962G(XX) TX 5PPM 022960
EXEC II/BEACON RX (450-4474) PAGER 023870
4EG25A10 TX 2PPM Icom 021770
4EG26A10,A,B RX 2PPM Icom-12.4/24 021780
4EG26A13 RX (406-470) -12.4/27 021790
4EG27A11,A,B TX (450-470) Sicom 021940
4EG27A12 TX Sicom 023310
4EG28A12 RX FC<420)+20/21 022940
4EG28A13,A,B RX (FC>450)-20/21 023950
4EG28A14 RX (450-470)-12.4/24 023320
4EG28A28,A RX (450-470)-23/21 023330
19A129393G(XX) TX (406-512)EC,5C 021960
  TX 2C 023400
19A129393G(XX) RX EC,5C-11.2/27 021970
  RX 2C 023410
19A130283G(XX) TX EC,5C+11.2/27 023440
  RX 2C 023441
19A130605G4 TX   023877
19A137645G7 RX MPR 023690
19A137763G(XX) TX (406-512) EC,5C 023670
  TX 2C 023580
19A137763G(XX) RX EC,5C-11.2/27 023680
  RX 2C 023590
19A701562G6 TX Delta 023840
19A701562G6 RX Delta 023850
19A702375G1 TX MPI 023860
19A702375G2 RX MPI 023861
19B206175P6A,P7A,P7B,P7C TX (406-512) 021710
19B206204P1A TX (450-470)FC/72 021800
19B206576P[6A,P7,A,B,C RX (406-512)-12.4/24 021720
19B226962G(XX) TX (406-512) 023340
19B226962G(XX) RX (406-512) 023350
19B226962G21,22,23,24,26 RX High Injection+11.2/27 023351
19B233066G5 TX Century II(420-470),Phoenix 023500
19B233066G6 RX (420-450)+21.4/9 023510
    Century 11.7 Phoenix See Note **  
19B233066G7 RX (450-470)-21.4/9 023520
    Century II & Phoenix See Note ** 023520
K1003A RX (25-30)+5.26/2 160035
  RX (30-42)+5.26/3 160036
  RX (42-50)-5.26/3 160037
K1004A TX FC/6 160034
KXN1028B TX FC/3 167240
KXN1044A TX FC/6 167430
KXN1085A RX   167476
KXN1087A TX FC/3 167475
KXN1093A,B RX   167585
KXN1094A TX FC/3 167590
KXN6125AA TX (25-32.99) 160048
  TX (33-54) 167899
KXN6126AA,AB,AC RX (30-50) 167210
KXN6158AA TX (25-35.99)FC/2 167260
  TX (36-50.0)FC/3 167270
KXN6159AA RX   167280
KXN6193AA RX Use KXN6197AA  
KXN6194AA TX (30-35.99) 167572
  TX (36-50.0)FC/2 167573
KXN6197AA RX (30-35.9)FC+8.4 167574
  RX (36-50)FC-8.4 167575
KXN6235AA RX Envoy (33-40) 167625
KXN6235AB RX Envoy (41-45) 167626
KXN6341 RX (30-50) Radius 167386
KXN6344 TX (30-39.9)Radius 167387
  TX (40-50) Radius 167385
TLN1020, 1081 RX (25-30 &36-43)+2.5/3 See Note 160042
1085 & others RX (30-36 &42-50)-2.5/3 See Note 160043
KXN6235 RX Envoy (150-174) 167629
KXN6266 TX (144-174.0) Maxar 50 167634
KXN6279 RX (144-174.0) Maxar 50 167635
KXN6300AA RX (138-148.6) 167651
  RX (146-174) 167652
KXN6330 TX (138-174) Radius 167656
KXN6331 RX (138-174) Radius 167657
TLN1081A RX (FC<158) +8/12 162210
  RX (FC>150.8)-8/12 162211
TLN1083A TX   162209
TLN1086A RX (FC<150.8)+8/12 2PPM 162213
  RX (FC>150.8)-8/12 2PPM 162214
TLN1087A TX   162212
TLN1146A/TLN1147A RX Fx = FC-8/12 167040
TLN1190A TX   167990
TLN8602A RX RES61,62 (FC<150.8)+8/12 161182
  RX (FC>150.8)-8/12 161183
TLN8603A TX RES65 161181
YBSR83 TX Use YVSR83  
YM35 RX HT-200 164413
YMW35 RX HT-200 164414
YMRX109 RX Fx=FC-16.8/3 HT-220 HT-210 161116
YMRX110 RX Fx=FC-18/3 HT-220 18MHz I.F. HT-210 161118
YN19 TX Holder Type HC-25/U HT-200 161145
YNW19 TX Holder Type HC-18/U HT -200 161146
YVNW19

TX

 HC-18/U with thermistor HT-200 161147
YVSR83 TX HT-220 161115
YSW82 RX   161112
K1017A TX   166615
K1018A RX   166616
KXN1002A TX   166606
KXN1003A/B TX   166629
KXN1005A TX Use KXN1007A  
KXN1006A RX   166608
KXN1007A TX   166607
KXN1013B TX   167564
KXN1024A RX Use FC-11.7/24 167908
KXN1034A RX MT500 167420
KXN1035A TX MT500 167410
KXN1039A/1067A RX Normal split (FC-21.4/6) see KXN1067A 167220
KXN1052A TX   167200
KXN1086A RX Mitrek 167500
KXN1088A TX 5PPM 167490
KWN1095A TX 2PPM 167582
KXN1112A RX 2PPM 167603
KXN6047A RX VAJB 166628
KXN6095AA RX UPKA (406-512)=17.9/9 167000
KXN6095AA RX (450-512)-17.9/10 167001
KXN6121AA TX Maxar 167970
KXN6122AA RX Maxar 167980
KXN6206A TX HT-90 with Comp. Cap. 167591
KXN6207A RX HT-90 with Comp. Cap. (450-512) 167592
    (408-430) 167621
KXN6222A

TX

 Expo (406-512) 167609
KXN6224A

RX

 Expo (406-420) 167610
    (450-512) 167611
KXN6236AA

RX

 (403-431)-45/6 167647

 

 

RX

 (431-474)-45/8 167648
KXN6266

TX

 (444-474) Maxar 50 167643
KXN6279

RX

 (444-474) Maxar 50 167644
KXN6330

TX

 (450-474)Radius 167654
KXN6331

RX

 (450-474) Radius 167655
Above units can only be modified down in frequency as noted.
RT-50 TX   825155
  RX   825156
834L TX   140900
  RX   140910
867L TX   140840
  RX   140850
890L TX   140690
  RX   140700
HX Series TX   141025
  RX   141026
731L TX   140820
  RX   140830
734L TX   140880
  RX   140890
767L TX   140940
  RX   140950
768L TX   141012
  RX   141013
790L TX   140760
  RX   140770
HX Series TX   141014
  RX   141015


Here's some engneering notes from ICM: