Mine don't have labels on them. Usually they were sold as part of an SP
package that included the window filters, multicoupler, etc.
I haven't tuned or swept this particular set, but from experience, the
cavity resonance will tune over a wide swath, probably the full 406-512 MHz,
but the loop lengths may not be optimal over such a wide span (depending on
how the cavities are being used), and likewise, the cable lengths will vary.
You have something in particular in mind you want me to test?
--- Jeff WN3A
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Eric Lemmon
> Sent: Sunday, May 30, 2010 12:29 PM
> To: [email protected]
> Subject: RE: [Repeater-Builder] Re: Help Needed (Guidance and
> advice) tuning a DB Products Duplexer
>
>
>
> Jeff,
>
> Can you positively identify the window filters by part
> number? Also, what
> is the useful frequency range of the units you purchased?
>
> 73, Eric Lemmon WB6FLY
>
> -----Original Message-----
> From: [email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:[email protected]
> <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Jeff DePolo
> Sent: Sunday, May 30, 2010 8:39 AM
> To: [email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>
> Subject: RE: [Repeater-Builder] Re: Help Needed (Guidance and
> advice) tuning
> a DB Products Duplexer
>
> <snip>
>
> I bought two sets of those window filters from the same guy,
> but I knew what
> they were, caveat emptor is the golden rule at Dayton or any
> other hamfest.
> Actually I think I gave him $75 for the pair, and I took the two
> cleanest/newest ones he had (the newer dark-tan ones).
>
> --- Jeff WN3A
>
> <snip>
>
>
>
>
>
