Hello and thanks for the read. I have an ERC (Electronic Research Co.)
Oven-Crystal in an 8 pin octal base can.
Does anyone has a lead to a site where I could find which pins are for the
115V AC heater, +V and it's ground and at what voltage range to make the
1MHz xtal oscillate, and which pin for it's output.
I am trying to adapt this unit to fit inside a Motorola R-1201A signal
generator that is missing the original Xtal unit.
Thanks for any help.
Larry McGee

Larry McGee wrote:
Hello and thanks for the read. I have an ERC (Electronic Research Co.)
Oven-Crystal in an 8 pin octal base can.
Does anyone has a lead to a site where I could find which pins are for the
115V AC heater, +V and it's ground and at what voltage range to make the
1MHz xtal oscillate, and which pin for it's output.

An ohmmeter and a bridge will tell you what you need to know. The two
pins that have DC resistance between them are for the heater. You should
know that not all of these have 115VAC coils, a lot of them have lower
voltage DC ones.

The two pins that go to the crystal will have a higher capacitance between
them than the other pins, which the capacitance tester function the DMM
will tell you. If you have a real bridge, you should be able to sweep back
and forth and see an impedance dip at 1 MHz.

DC on heaters is good! It will reduce the amount of 60 Hz jitter.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Larry McGee wrote:
Hello and thanks for the read. I have an ERC (Electronic Research Co.)
Oven-Crystal in an 8 pin octal base can.
Does anyone has a lead to a site where I could find which pins are for the
115V AC heater, +V and it's ground and at what voltage range to make the
1MHz xtal oscillate, and which pin for it's output.
I am trying to adapt this unit to fit inside a Motorola R-1201A signal
generator that is missing the original Xtal unit.
Thanks for any help.
Larry McGee



Is this a complete crystal oscillator or simply an oven-ized plug-in
crystal unit? If its a simply oven/crystal unit, there won't be any Vcc
voltage. Try and open the can, remove the crystal, then map the xtal
socket pins to the octal plug. Some of their ovens are dual-voltage
(e.g. 6v and 12v DC). You also may be able to actually see the oven
windings going to the socket.