[HBR] Quartz Crystal Oscillator
John Landrigan
jlandrigan at pol.net
Thu Aug 4 16:19:40 EDT 2011
Now that I've gotten myself unconfused, here is what I am trying to do:
The HBR 16 variant that I am building up has a High Frequency L/C oscillator which mixes with the antenna input into an RF amplifier. The output from the first mixer goes to a Millen 1600 KHz IF transformer. The next step is to take this output and mix it with the 2nd oscillator, using the crystal I have, 1710 KHz, and put that output into a Miller 100 KHz 2nd IF transformer. There are two subsequent IF amplifiers that use similar Miller 100 KHz IF transformers.
Once I ever get that setup working, I would like to change things so that the output from the Millen 1600 KHz IF transformer mixes with a 455 KHz 2nd oscillator and IF transformer then into a crystal lattice filter, or into two subsequent 455 KHz IF amlifiers.
The next grandiosity is to find a means to develop a 2nd oscillator that will mix so that an output will be made available to either an 85 KHz IF or 50 KHz IF. It seems like the finding of crystals specific for 1685 KHz and 1650 KHz is not going to happen in this lifetime. Therefore, some type of L/C circuit is going to be in order. I was thinking that the Russian 59 KHz quartz crystal oscillator tube might prove usable somewhere in this mish-mash of thinking out loud.
John KA4RXP and Jody KG4VES
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