Ok, contacted Ron Baker (WB4HFN) about this and he told me that the crystals for the 4-line will work with the SW-4A, but not the ones from the SPR-4 as they are larger. So good to know.

kt4hx wrote:

Ok, contacted Ron Baker (WB4HFN) about this and he told me that the
crystals for the 4-line will work with the SW-4A, but not the ones from
the SPR-4 as they are larger. So good to know.

ICM should still be able to cut replacements for the 4-line if you need
them.
--scott

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

Thanks Scott. They are one of the sources I have looked at.