Ian,
I suspect that the duplexer was made by TX-RX Systems. The "28"
indicates that it uses the "Vari-Notch" pseudo bandpass circuit, the
"70" indicates that it is for the 450-470 MHz band, and the "41" is an
electrical specification of the number, size, and shape of the
cavities. The "a" indicates a standard 19-inch rack mount.
My TX-RX catalog does not list a "41" variant, so it might be a special
model. Contact <[EMAIL PROTECTED]> for help in determining the
specifications of your duplexer.
73, Eric Lemmon WB6FLY
ian wells wrote:
>
> can anyone advise any information on the above diplexer
> Thank you
> Ian Wells
> Kerinvale Comaudio
> mail service 1017,
> Biloela,4715.
> www.kerinvalecomaudio.com.au
> 1-email- [EMAIL PROTECTED]
> 2-email- [EMAIL PROTECTED]
>
>
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