Commercial and Amateur
VHF & UHF Radio Equipment
Providing innovative solutions for 45 years!

We use only good quality, commercial grade crystals of 5 ppm tolerance from the best crystal labs.  Normal delivery time is about 4-5 weeks because the best crystals are aged to provide good stability over a period of time.   Sorry, no COD's on crystals.

Beware of amateur grade crystals advertised in ham magazines. Many do not have good enough calibration tolerance or stability.   Insist on only commercial grade crystals for any 2-way radio equipment.   

Note that we no longer sell "express" crystals.   The labs with which we deal no longer want to have to answer customer complaints about frequency drift due to aging.  Some labs do make express crystals, but, if pressed, they will admit that you should buy good crystals at the same time and discard the quickie crystals as soon as possible. 
 

Frequency Stability Options

We offer 2 frequency stability options for our TA51, TA451, and TA901 Exciters and our R100, R144, R451, and R901 Receivers:

Standard frequency stability

for amateur transmitters and all receivers consists of a commercial-grade crystal with a rating of ±5 ppm over a temperature range of +10°C to +60°C (50°F to 140°F).

OV-1 Crystal Oven Option

available for single-channel transmitters and receivers provides ±2 ppm over a range of -30°C to +60°C (­22°F to +140°F). The oven is proportionally controlled, drawing more heater current as the ambient temperature drops. This option is recommended for transmitters which are enclosed, such as in a repeater or rf-tight box.  Operating power is 13.6 Vdc at 20 to 400 mA. At room temperature, the current idles around 20 mA after an initial 30­second warm up.

Synthesized Radios

Note that our synthesized radios do not require channel crystals or crystal ovens.  Factory wired synthesized radios come standard with temperature compensated crystal oscillators (TCXO), which provide 2ppm stability without requiring a crystal oven.  That is a major advantage of synthesized modules vs. crystal controlled.

PRICES:

Crystals, commercial grade, for all units $25.00 (allow 4-5 weeks for manufacture)

OV-1 Crystal Oven option required for FCC Type Acceptance on commercial band, optional for ham bands $50.00