NO SALES TO ITALY or ARGENTINA! For other, non-USA mainland destinations, PLEASE ALLOW up to 4 to 6 WEEKS! After numerous losses, thefts and claims, we longer ship to these two countries. Sorry. Inquire by e-mail for details.
FT-243 crystals have pins spaced 1/2 inch apart, and are used in MANY ham radios
made from
the 1940s through 1970s. They are also used in countless military sets such as the BC-611 and GRC-109 etc.
Note- some of these are original FT243 crystals, some are reworked surplus units with
wire lead crystals inside as described in tube transmitter articles using them in CQ Magazine
and detailed technical analysis in Electric Radio Magazine.
Can I TRUST AF4K? Read what others have said here.
NO SALES TO ITALY or ARGENTINA - Other non-USA destinations, PLEASE ALLOW 4 to 6 WEEKS! Inquire by e-mail for details.
CLICK ON LOGO - CRYSTALS FOR SPECIFIC BA RADIOS:
FOR SALE: FT243 crystals - most are $14.00 each plus S&H, as follows:
NO SALES TO ITALY or ARGENTINA! For other, non-USA mainland destinations, PLEASE ALLOW up to 4 to 6 WEEKS! Inquire by e-mail for details.
ORDERING PAGE for 100 kHz to 1500 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 1500 kHz to 1999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 2000 kHz to 2999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 3000 kHz to 3499 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 3500 kHz to 3799 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER - WORKS NOW
ORDERING PAGE for 3800 kHz to 3999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER - WORKS NOW
ORDERING PAGE for 4000 kHz to 4499 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 4500 kHz to 4999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 5000 kHz to 5999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 6000 kHz to 6499 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 6500 kHz to 6999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 7000 kHz to 7149 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 7150 kHz to 7299 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 7300 kHz to 7499 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 7500 kHz to 7999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 8000 kHz to 8099 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 8100 kHz to 8299 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 8300 kHz to 8499 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 8500 kHz to 8999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 9000 kHz to 9999 kHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 10.0 MHz to 10.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER - WORKS NOW!
ORDERING PAGE for 11.0 MHz to 13.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 14.0 MHz to 14.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 15.0 MHz to 17.499 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 18.0 MHz to 19.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 20.0 MHz to 21.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 22.0 MHz to 27.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 28.0 MHz to 40.0 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 40.0 MHz to 60.0 MHz FT243 CRYSTALS (6m etc.) - CLICK HERE TO SELECT AND ORDER
ORDERING PAGE for 60.0 MHz to 150.0 MHz FT243 CRYSTALS (2m etc.) - CLICK HERE TO SELECT AND ORDER
ORDER FT243 CRYSTALS with VISA, MASTERCARD, AMEX, PAYPAL etc:
NOTE: Automated shipping prices at checkout are only for crystal orders!
E-mail me for shipping cost on larger items BEFORE sending payment.
QUESTIONS?
ORDERING PAGE for 10.0 MHz to 10.999 MHz FT243 CRYSTALS - CLICK HERE TO SELECT AND ORDER - WORKS NOW!
NEW - Crystal for Heathkit: 38.395 MHz hc6u metal can style. Available for $16.00 each.
SB301 = 29.5 MHz band.
Also used on SB401, HW101, SB101, SB102 etc.
NO SALES TO ITALY or ARGENTINA! For other, non-USA mainland destinations, PLEASE ALLOW up to 4 to 6 WEEKS! Inquire by e-mail for details.
BROWSE ALL MY E-BAY ITEMS - CLICK HERE!
SPECIAL CRYSTAL PAIRS
with 455 kHz T-R offset for 160m and 75m AM etc:
(as used in BC-611 and other military radios, etc.)
These are FT243 T-R Crystal pairs for 455 kHz i.f. military radios such as BC-611 etc.
(For some pf these, I only have one pair left)
1885 - 2340 kHz
1945 - 2400 kHz
1985 - 2440 kHz
3625 - 4080 kHz
3735 - 4190 kHz
3800 - 4255 kHz
3870 - 4325 kHz
3880 - 4335 kHz
3885 - 4340 kHz
5500 - 5995 kHz
Available for $14.00 per crystal.
These crystals were often used in military two way radios such as BC-611, BC-745, MAB, DAV, Pogo Stick, etc.
NO SALES TO ITALY or ARGENTINA! For other, non-USA mainland destinations, PLEASE ALLOW up to 4 to 6 WEEKS! Inquire by e-mail for details.
SPECIAL 75m DOUBLER CRYSTALS:
FT243 DOUBLER crystals for certain military and ham transmitters:
1940, 1942.5 and 1945 kHz - for use at 3880, 3885 and 3890 kHz.
Available for $14.95 per crystal. E-mail me for details or to order.
6m CW X6 Multipliers:
8350 kHz = 50.100 MHz - others available...
6m FONE X6 multipliers:
8375, 8400, 8425 kHz - many others available...
2m AM X6 multipliers etc.:
8025, 12500 kHz (many others close to these too!)
8025 X 18 = 144.45 MHz.
FOR THOSE WHO PREFER - HERE ARE A NUMBER OF THE ORIGINAL WW2-era FT243 Crystals that
I have recently obtained - NONE OF THESE HAVE THE NEWER SMALL CRYSTALS INSIDE OF THEM:
CLICK HERE FOR THE COMPLETE LIST
The price for one to four crystal on a given frequency is $49.00 each plus shipping.
Price for 5 to 19 crystals on the same frequency would be $29.00 each and
price on 20 to 29 crystals on the same frequency would be $25.00 each and
price for 30 or more crystals on the same frequency would be $19.00 each plus shipping.
Delivery is typically around 4 weeks after receipt of order.
Inquire via E-mail. CLICK HERE.
We can supply your custom cystals, VCXO, TCXO and filter needs:
Pricing will be accordin to custom quotation for these devices. Please state quantity and type needed.
* HC49 series (HC49U / HC49S / HC49SMD)
* Surface Mount Crystals (8 X 4.5mm, 7 X 5mm, 6 X 3.5mm, 5 X 3.2mm, 4 X 2.5mm, 3.2 X 2.5mm, 2.5 X 2.0mm and 2.0 X 1.6mm)
* Tiny watch crystals (2 X 6mm, 3 X 8mm, SMD6.9 X 1.4mm, 4 X 1.5mm and 3.2 X 1.5mm)
* Type UM-1 and UM-5 crystals
* MCF filters
* Oscillators (full/half size, 7 X 5mm, 5 X 3.2mm, 3.2 X 2.5mm and 2.5 X 2.0mm)
* TCXO,VCXO (7 X 5mm, 5 X 3.2mm, 3.2 X 2.5mm)
* Ceramic resonator & filter(ZTT, ZTA, ZTB, CRB)
* SAW Devices (TO39, F11, QCC8C, SM2, 3.8 X 3.8mm, 3 X 3mm)
Inquire via E-mail. CLICK HERE.
Notes:
3560 kHz - QRP etc.
3558 kHz - FISTS GROUP
3615 kHz - EUROPE etc.
3675 kHz - Florida AM Group
3700 kHz - SLOCHAT GROUP etc.
3705 kHz - Very popular CW frequency
3837 kHz - AWA Net on AM
3870 kHz - West Coast AM
3875 kHz - West Coast AM
3880 kHz - Nationwide AM
3885 kHz - East Coast AM
3890 kHz - East Coast AM
7030 kHz - QRP etc.
7040 kHz - QRP, Boatanchors etc.
7044 kHz - Flying Pigs QRP
7050 kHz - Boatanchors
7052.7 kHz - SLOCHAT GROUP etc.
7114 kHz - Various CW Nets
7122 kHz - Various CW Nets
7123 kHz - GLOWBUGS GROUP, SLOCHAT, OTHER NETS etc. etc.
7143 kHz - Lake Erie Boatanchors Group, X2 for 20m AM
7160 kHz - popular AM frequency
7285 kHz - AM Frequency
7290 kHz - AM Frequency
7293 kHz - AM Frequency
7295 kHz - AM Frequency
14060 kHz - QRP etc.
14286 kHz - AM Nationwide
18096 kHz - 17m CW Frequency
21060 kHz - QRP CW
Ratings:
Tolerance ratings are + / - 30 ppm.
Capacitive load = 18 to 20 pF.
Most of the items above are now available in HC-6/U
and in HC-49/U or HC49/US wire lead holders also.
SPECIAL:
160m band HC33U crystals like hc6u, with wire leads on 1843 kHz - for only $4.00 each plus shipping!:
CLICK HERE TO E-MAIL ME AND ARRANGE PURCHASE!
X203 - 28.0 - 28.5 MHz = 42.5Mhz
As used in many Drake, Heathkit, Hallicrafters, Hammarlund, Knightkit, National, Lafayette etc.
NO SALES TO ITALY or ARGENTINA! For other, non-USA mainland destinations, PLEASE ALLOW up to 4 to 6 WEEKS! Inquire by e-mail for details.
Several crystals are available on 1700 kHz etc. as follows:
HC6/U Crystals on 1700 kHz - available for $16.00 each
FT-243 Crystals on 1700 kHz - available for $14.00 each
Price for most is $14.00 each plus shipping. E-mail me for a total.
Bargain Basement Deals on Groups of Ham Band FT243 and hc6/u Crystals!
CLICK HERE for lists - Many as low as $2.00 or $3.00 each for ham band crystals!
E-mail me with your crystal needs. Click Here.
During the World War Two era, the U.S. Military had a number of different radio sets using these crystals:
There were jeep radios developed by the Signal Corps Laboratory in conjunction with Galvin Corp. (Motorola).
Armor 20.0 - 27.9 Mhz Channel Numbers 0 - 79 Ch. No. = (Freq (MHz) - 20)
x 10
Jeep Radios: SCR 509/510 : 20 to 27.9 MHz (Armor) SCR 609/610: 27 to 39.9 MHz (Artillery)
Crystal-saver Design:. The crystal frequency is multiplied by 4 to provide the local oscillator for a receiver with a 4.3 MHz IF. In
transmit, the DC output of the receiver's FM discriminator is used to frequency lock the TX oscillator to the crystal controlled RX frequency.
SCR-300 Walkie Talkie (Infantry)
Similar design to the jeep radios. However, the receiver local oscillator is free running with a single crystal in a separate calibration oscillator providing manual calibration points.
The navy used a different crystal scheme, with FT243 crystals for the RCK Receiver. For example, using a crystal frequency of 14.233 MHz and operating frequency of 116.10 MHz. The Navy used FT243 crystals in the TDQ Transmitter and others, for example, Crystal Frequency = 14.300 MHz, operating frequency 128.70 MHz.
Many other crystal CHANNEL NUMBERING and even CHANNEL LETTER schemes were used throughout this era.
The common US crystal controlled WW-II vintage FM sets operated between 20.0 and 38.9 MC and used either FT-241 or FT-243 holder crystals that were multiplied several times to get to either the operating frequencies (sets using FT-241) or receiver mixer injection frequency (FT-243 crystals). There were two bands defined, Armor and Artillery. Infantry didn't get an assigned band until the late 40's. Except for the tunable BC-1000, they mostly used either HF or the Artillery band sets.
Channel numbers were assigned, from which you can read the operating frequency. Armor band covered 20.0 - 27.9 MHz and the channel numbers ran from 0 to 79. Artillery band ran from 27.0 - 38.9 MC and the channel numbers ran from 270 to 389. Channel numbers on the FT-241 and FT-243 match but the FT-241 crystals frequencies were in the low MF range whereas the FT-243 crystals were higher, roughly 5750 to 8700 kHz. The FT-243 crystal frequency was multiplied several times to get to a frequency offset from the operating freq. by the IF freq.
Some other sets had channel numbers assigned. The Pogo Stick radio (SCR-511, BC-745) had channel numbers from 1 to about 69 but they were arbitrary assignments and the channel numbers were not always on the crystals, but on the BC-746 tuning units. The BC-733 Localizer receiver had channel numbers in
the 700 range and used FT-243 holders with the channel numbers on them. Crystal freqs are in the same general range as for the FM sets.
The AN/TRC-1 operates from 70-100 MHz and has corresponding channel numbers. For example, Channel 705 is 70.5 MHz. Channel 948 is 94.8 MHz, etc.
An additional CHANNELIZED FT243 Crystal Frequency scheme was used for crystals like 7006.667 kHz, 7106.667 kHz, 7206.667 etc. Example: CHANNEL 60 = 7706.666 kHz.
(thanks to AF4K, WA5CAB, Jack Antonio, Al Klase and to a few others for this information)
AVAILABLE: Yaesu FT7B Crystals: - 15 meter band - 35.5 MHz - available for $16.00 each
Others available such as 36.0 MHz etc. - Inquire
Simply install these in any metal panel and they make a great FT243
FT243 Sockets - I currently have THREE types available:
These are for the metal can crystals with pins spaced
These are for the newer metal can crystals with pins spaced
FT-243 AM Broadcast Band Transmitting Crystals - Great for Home Wireless Broadcasting.
1 - 2 MHz FT-243 Crystals- CLICK HERE FOR LIST.
2 - 5 MHz FT243 CRYSTALS - CLICK HERE FOR LIST.
5 - 8 MHz FT243 CRYSTALS - CLICK HERE FOR LIST.
8 - 30 MHz FT243 CRYSTALS - CLICK HERE FOR LIST.
FT171B CRYSTALS - CLICK HERE FOR LIST.
HC-6/U CRYSTALS - CLICK HERE FOR LIST.
HC25/U CRYSTALS - CLICK HERE FOR LIST.
HC-33/U CRYSTALS - CLICK HERE FOR LIST.
HC49U CRYSTALS - CLICK HERE FOR LIST.
HC50/U CRYSTALS - CLICK HERE FOR LIST.
HC-51/U CRYSTALS - CLICK HERE FOR LIST.
DC34 and DC35 CRYSTALS - CLICK HERE FOR LIST.
Antique and Large CRYSTALS - CLICK HERE FOR LIST.
QUANTITY OF 100 FT243 CRYSTAL BLANKS
I have a box of over 100 nice clean quartz crystal blanks made for
I also have a box of 200 nice clean quartz crystal blanks made for
Contact plates are also available; Quantity 100 for
$5.00 plus shipping Inquire by e-mail. Click here.
Phenolic insulators are also available; Quantity 100 for
$5.00 plus shipping Inquire by e-mail. Click here.
Copper, tin and brass electrodes (mixed) are also available; Quantity 100 for
$5.00 plus shipping Inquire by e-mail. Click here.
CR1A CRYSTALS - CLICK HERE FOR LIST.
DC34 Large CRYSTALS - CLICK HERE FOR LIST.
HC-6/U CRYSTALS - CLICK HERE FOR LIST.
80m Band HC-33/U Crystals - (HC-6/U w/wire leads)
Custom hc51/u crystals (like hc6/u) available for orering from 400 kHz to 2.5 kHz
Add shipping costs to all prices!
73 from Brian ((( Amateur Radio G3XLQ / AF4K )))
Latest list always updated at:
See main page for special terms of sales to Canada.
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X204 - 28.5 - 29.0 MHz = 43.0Mhz
X205 - 29.0 - 29.5 MHz = 43.5Mhz
X206 - 29.5 - 30.0 MHz = 44.0Mhz
Crystals for the 10m bands 42.5 MHz, 43.0 MHz, 43.5 MHz and 44.0 MHz crystals area available for this radio.
for $20.00 each plus shipping.
and other fine amateur and shortwave receivers.
Frequency Standard 100 kHz TALL hc6u crystal (hc13u) with standard pins (0.050") like hc6u.
These are made to the highest manufacturing
standards with excellent tolerance to ensure that your radios are calibrated and right
on the frequency every time.
Dimensions: 1.5" X 0.75" - and the pins are spaced 0.486" apart. Pins 0.050" diameter
100 kHz calibrator crystals standard hc13/u - $19.00 each
HC-6/u crystals on 1000 kHz - available for $16.00 each.
FT243 Crystals
NOTE: Many of these same frequencies are now also all available as
wire lead HC49 crystals and HC6/U crystals too. Click to inquire.
NOTE:
Most of the FT243 crystals above are remanufactured crystals using original
WW2 era FT243 holders with a newly manufactured, HC49 or HC49US hermetically-sealed crystal
mounted inside. Like all crystals, these should not be used with a grid current
of greater than about 60 mA. They have been used successfully in many typical rigs
like the Heath DX40, HW16, DX100, Ameco AC-1, Drake 2NT, Hallicrafters HT-40, BC610,
Globe King, Homebrew power oscillators, and MOPA rigs etc.
MORE DETAILS ABOUT FT243 AND FT241 Crystals:
AN/TRC1
AN/TRC-20 (RT-111/TRC-20)
BC-611
SCR-609/610 (BC-659)
BC-620
BC-745
SCR300
SCR-619 (BC-1335)
SCR-508/528
They used the so-called crystal-saver design. The crystal frequency is multiplied by 4 to provide the local oscillator for a receiver with a 4.3 MHz I.F.
In transmit, the DC output of the receiver's FM discriminator is used to frequency lock the TX oscillator to the crystal controlled RX frequency.
e.g. - (8000 x 4) + 4300 = 36,300 KHz. Normal operating frequencies would have been 36.3 through 37.4 MHz.
There were three frequency bands for FM in the WWII era. In addition to pioneering this mode, the Signal Corps chose to crystal control most of the radios. The total US production of crystals before the war was about 100K units, and millions more were calculated to be needed. Most of the raw quartz came from Brazil past the U-boats. There were literally millions of these crystals manufactured, a great many of them during 1943 - 1944.
Artillery 27.0 - 38.9 Mhz Channel Numbers 270 - 389 Ch. No. = Freq (MHz)
x 10
Infantry 40.0 - 48.0 MHz Channel Numbers 400 - 480 Ch. No. = Freq (MHz) x
10
Tank Sets: SCR-508/528 - 20.0 to27.9 Mc (Armor) SCR-608/628 – 27.0 to
38.9 MC (Artillery)
These used the Armstrong FM system. The signal from a crystal oscillator at about 400 KHz is modulated by a phase shifter, then multiplied up to the
operating frequency. Receivers are not crystal controlled, but have car-radio-style push-button presets.
Crystals are the FT-241 type. Resonant frequency is Ch. Freq. divided by 54 for Armor, and Ch. Freq. divided by 72 for Artillery.
Crystals are FT-243's. E.g., (8000 x 4) + 4300 = 36,300 KHz.
For example: Channel 323 = 7000 kHz. System with crystal every 25 kHz.
Channel X =
Notes:
BC611 used a lot of crystals in the 3500 - 6000 kHz range.
BC745 used a lot of crystals in the 5000 - 6000 kHz range.
It uses FT-243 for receivers, and FT-241 for transmitters.
crystal socket. Stock up for homebrew projects and repairs.
Available for $8.00 each, by mail order check or money order. ALSO, use
your credit card, Paypal etc. with the shopping cart button below.
Click here to e-mail me about buying or to inquire.
Pair of pin jacks for $5.00 a pair.
Original style crystal sockets - $8.00
Original James Millen NOS ceramic sockets - $12.00, while they last.
about 1/2" apart. These are new, ceramic sockets usable
all the way up to VHF. Single screw mount, with solder terminals.
Great for amateur radio homebrew or repairs.
For diagram and dimensions click here.
They have 0.486" pin spacing. Smaller diameter pins than FT243.
These mount with a single hole.
Available for $3.00 each or ten for $25.00 plus shipping.
about 0.3" apart. They are new metal and plastic sockets usable
all the way up to VHF. Single screw side mount, with solder terminals.
Great for amateur radio homebrew or repairs.
For diagram and dimensions click here.
Available for $2.50 each or 10 for $20.00 plus shipping.
Now Available!
use in FT243 holders.These are a nice mix from about 1000 kHz up to 8500 kHz.
See photo below:
I will sell the whole box for $10.00 plus $7.00 for USA Shipping.
use in FT243 holders.These are a nice mix from about 1000 kHz up to 8500 kHz.
See photo below:
I will sell the whole box for $15.00 plus $7.00 for USA Shipping.
3546 kHz - great for CW work.
Will sell them for $6.00 each plus shipping.
Special order FT243, hc6/u and hc50/u crystals are now available on custom frequencies from 2.5 MHz to 40 MHz.
Pricing is $19.00 to $45.00 depending on the quantity. Inquire by e-mail please.
and priced at $35.00 to $125.00 per crystal depending on the quantity. Inquire by e-mail please.
PAYMENTS VIA PAYPAL GLADLY ACCEPTED!
Just add $5.00 for USA shipping and $2 for Paypal fee.
OR: to inquire or buy any item(s):
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