Is that rare to find 456 kHz Freq?

I don't know the models of what I have,
but will photograph them in case anyone needs parts.
The first is the Philips console and AWA console in my eBay thread
that I advertised to give away as empty cabinets.

It turns out they has chassis separate.

Aren't they variable anyway, because you turn a screw to tune them,
and the screw you're turning into it is a core?

Or are they so different that they can't be tuned to each other's range?

If you have a CRO, sig gen, or perhaps frequency counter, you can determine the IFT frequency, which if a note on the circuit in AORSM's s right is 175 kHz.

The other they used was 456 kHz

Marc

Aren't they variable anyway,

Yes, but within a limited range around their nominal inductance which is designed for the particular IF concerned.

I thought 455kHz was one of the most common IF standards, so 456kHz ought to be within tunable range of that?

Maven

In post #5, Ghandhn said: "Just in case it is not marked anywhere, the IF is 175kHz in this radio"

IF's had several frequencies over the years, some are in the hundreds of kHz some two hundreds.

It was all to do with the evolution of the materials as the older iron had frequency limitations.

One of the things was to make sure that an IF heterodyne did not fall on the frequency of a radio station. HMV used an odd frequency of around 475.5 expressly for this reason.

455 kHz area, in later sets did tend to become the standard one used, but do remember there were, as with HMV, AWA, Airzone, other frequencies used

Marc

THis is what I have, but don't know much about them.
Just "Healing" and "Kingsley",
and the other brands I mentioned.. Think one is Philips, and one AWA.

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