[R-390] Collins 75S-3

[Jim Brannigan]

There must be an error in your manual.  Table 2-1 shows 1E-28A, 2E-28B,
3E-28C.
It does not matter which socket you use for 10M.  From an ergonomic
standpoint I use 28A for CW, 28B for mid fone and 28E for high fone.
With three 10M crystals you will only have 600kc. of coverage on 10M, so
pick them carefully.

Jim

> According to the manual, band-switch position 1E - 28A is furnished with a
> 15.8275 MHz crystal that covers 28.5 to 28.7 MHz.  However, it also states
> that in this position crystal socket 2E is connected.  Going through the
> schematic, it appears that crystal socket 1E is connected in position 28A,
> which I would assume is correct.  Table 2-1 in the manual does not make
any
> mention of socket 1E.  Is this an error? And is socket 1E actually
connected
> in band-switch position 28A as the schematic indicates?
>
> If I put in additional 10 meter crystals, does it make any difference
> whether I put them in 1E, 2E, or 3E?
>
> David C. Hallam
> KC2JD