NEW Old stock
All of these signal coils are part of our OLD workshop spare parts, way back in my days of "playing with" communications equipment when I was an active ZL and then VK call
Stupidly I appear to have not kept the data on these coils so I am providing as much information as possible - I actually think these were "special runs" for some transceivers way back in the mists of time ...
These are "signal coils" i.e the can contains ONE winding which is tapped, so although the base has a 5x PCB pin arrangement, only 3 are active pins.
Here is a schematic for this type of TOKO coil
These were originally used in the "front end" of the communications receivers, running in the HF and Lo VHF bands
TOKO RCL - Signal Coils
Made in Japan
TOKO was acquired by MURATA in 2014
Circa late 1970's (!)
Series: 10K
There are three different part numbers on the cans, 6 of each type
Part numbers: F538 (6 pieces) F536 (6 pieces) SKXY F535 Z 84141 (6 pieces)
Designed for use 5Mhz ~ 70Mhz
Spiral winding with low self capacitance
High Q
Threaded topside ferrite slug adjustment
Completely shielded
PCB mounting
5x PCB pins (4mm length) plus 2x mounting lugs
Each can has the part number printed on it but I cannot find a cross-reference to the TOKO datasheets that I found in the workshop. I also noticed that although these are definitely the 10K series, the dimensions are SLIGHTLY larger
It is not advisable to "go inside" the can, the can is crimped on two sides - the shield was not intended to be removed!
DIMENSIONS:
11.35mm height x 10.3mm x 10.3mm
COSMETIC CONDITION:
Old but absolutely unused
Cans are CLEAN
Pins are still fine for soldering (no excessive oxidisation)
NO physical damage
ALL can identification markings are clearly visible
TESTING:
While I was not about to sit down and work out the resonant frequency range for these coils, I did undertake a basic DC test to confirm all coils (and the tap) are fine. No problems at all with any can.
Just for fun, I have included a link to a guy who has provided a schematic for a little piece of gear so that you can "fire up" these coils and measure the frequency characteristics ..... HERE is the link
I have now placed these back into their little packets, sorted by type, and sealed them ready for a new owner who hopefully can make use of these coils
