At 8/10/2009 20:59, you wrote:
I guess I'm still looking for an answer to the original
question. Do the notch cavities work @600khz spacing?
The specs I gave for the DB-4050 were at 300 kHz spacing. At 600 kHz, the
loss goes down to 1.5 dB.
Bob NO6B
-
Hi DCflux,
Tried the bandpass + notches didn't change much.
On changing to the BpBr, any idea how much capacitance
is needed? I have a fistfull of those Johanson caps.
Also, a buddy of mine has a Sinclair Q202G that I'm
thinking about also. Will pick it up tomorrow see if
it is any
I'm thinking the 2-10 or 2-14pF ones.
On Tue, Aug 11, 2009 at 4:01 PM, tahrens301tahr...@swtexas.net wrote:
-
Hi DCflux,
Tried the bandpass + notches didn't change much.
On changing to the BpBr, any idea how much capacitance
is needed? I have a fistfull of those Johanson caps.
Also, a
@yahoogroups.com Repeater-Builder@yahoogroups.com
Sent: Tue Aug 11 18:01:13 2009
Subject: [Repeater-Builder] Re: Notch Cavities + 600KHz Repeater = Work?
-
Hi DCflux,
Tried the bandpass + notches didn't change much.
On changing to the BpBr, any idea how much capacitance
is needed? I have
Hi Dcflu7x,
It's a DB products SP-1894. Can't get any info on it from
anywhere.
Each of the 8 cans have the approx dimensions of 5 x 21.
A single screw-type shaft in the center, and one SO-239
sticking out of the top of the can. No variable caps, or
anything else on the cans. Each can has an
Ok, if they are the type with the variable coupling loop you should
have 2 coupling loop holes per cavity, just one has a round hole
cover. If so take 2 cavities and transplant a coupling loop to one of
them to make 1 band pass cavity. Make another one for the RX side
Place the band pass cavities
--- On Mon, 8/10/09, tahrens301 tahr...@swtexas.net wrote:
From: tahrens301 tahr...@swtexas.net
Subject: [Repeater-Builder] Re: Notch Cavities + 600KHz Repeater = Work?
To: Repeater-Builder@yahoogroups.com
Date: Monday, August 10, 2009, 1:21 PM
Hi Dcflu7x,
It's a DB products SP-1894
Hi Ralph,
No, they were 10 as came from the factory for 166 mhz,
so it didn't look like they were cut for anything
in particular.
DCflux - I started to do what you suggested... sounded
like something else to try. Took the link out of the
last can the loop wasn't soldered to the PL259
I've actually seen that before on a Wacom. Go with silver bearing
solder if you have it.
On Mon, Aug 10, 2009 at 11:19 AM, tahrens301tahr...@swtexas.net wrote:
Hi Ralph,
No, they were 10 as came from the factory for 166 mhz,
so it didn't look like they were cut for anything
in particular.
At 8/10/2009 10:21, you wrote:
Hi Dcflu7x,
It's a DB products SP-1894. Can't get any info on it from
anywhere.
Each of the 8 cans have the approx dimensions of 5 x 21.
A single screw-type shaft in the center, and one SO-239
sticking out of the top of the can. No variable caps, or
anything else
Hi Bob,
I was pretty curious about it as well, especially in
the 'early days' of this project. Nobody seemed to
know much about the stubs.
If you are looking at the spec. analyzer trk gen,
you see the notch. The left side goes down deep,
then comes up on the right side of the notch. But,
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