[Boatanchors] Need Eldico Crystals

[Glen Zook]

The Eldico units use the same basic crystals as the Collins S-Line.  However, the i.f. is shifted 100 kHz and therefore the crystals designed for the S-Line produce an operating frequency 100 kHz higher when used in the Eldico equipment.

I have the complete S-119 system including the power supply and station control.  I had the transmitter and receiver back in the mid 1970s but traded the equipment.  In the past few months I have been able to acquire the entire S-119 system.  The R-104 receiver was the "second source" required by the military for the Collins 75S-2 and the T-102 was the "second source" for the Collins 32S-2 transmitter.  Likewise, the power supply was the "second source" for the Collins 516F-2 and the station control was the second source for the Collins 312B-4.  The only thing is that the M-135 station control wattmeter reads only 100 watt maximum instead of the 2000 watts maximum (also has a 200 watt capability) of the 312B-4.

The "formula" for the Eldico is the crystal frequency minus 3.055 MHz instead of the Collins formula of crystal frequency minus 3.155 MHz.  This gives the lower limit of the range.

When using the transmitter in combination with the receiver only one set of crystals is required and those have to be in the receiver.  My T-102 doesn't have any crystals installed.  However, the receiver provides the injection and therefore ones in the transmitter are not needed.

Glen, K9STH

Website:  http://k9sth.com


--- On Tue, 12/1/09, Byron Tatum <bjtatum1 at att.net> wrote:

I am in need of crystals for two Eldico R-104 receivers and one transmitter. Frequencies are:
6.455, 6.655, 6.855
10.055, 10.255
17.055, 17.255, 17.855
12.0275, 12.1275, 12.2275
15.5275, 15.6275, 15.7275
15.7775
15.8275, 15.9275, 16.0275,
16.1275, 16.2275

Probably a real long shot but thought I would put out a request. Possibly someone has parted out some Eldico stuff, etc. I find it strange that the crystals were all missing in this equipment as the gear is operational. I have substututed some Collins crystals for testing, however the Collins frequencies differ slightly from Eldico. I really like the R-104 receiver, it sounds good and is sensitive and stable.