Re: PE1RKI 23 Cm Low loss filter responce

simonchettle
 

Pete

After a fair bit of re-build of the station (pre nfd) we became a bit of an a alligator based on the reports we were receiving and were giving. so a rebuild of the station is being considered. the use of 28 Mhz IF is to avoid the 2M and 70 Cm contest stations as they run a lot of power.s Also the 23 cm pre-amp measured 1.5 db nf (including relays and connectors) when tested but something may have failed on trip to site -tests to performed this week end.

73s and thanks for the replies

simon

-----Original Message-----
From: Pete - GM4BYF via Groups.Io
Sent: Thursday, July 11, 2019 7:51 PM
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] PE1RKI 23 Cm Low loss filter responce

From Phils picture, I think Bert did understand your question.
Guestimating from the grid there appears to be very little roll off
between 1268 and 1296.

I wonder what your problems were on field day ? Transmit or receive or both?

73
Pete GM4BYF

On 11/07/19 19:12, Phil Guttridge G3TCU wrote:
Hi Simon,

I bought a 23cm filter from Bert earlier this year and he sent me this
link. It doesn't show a lot of detail on the spectrum axis but it might
be some guide.

https://www.flickr.com/photos/pe1rki/23099962502/in/album-72157658763409636/

73, Phil G3TCU

On 11/07/2019 18:33, simonchettle via Groups.Io wrote:
Hi All
I am thinking of using a 28 Mhz to 1296 transverter as part of a
Station re-build ( after poor result on VHD NFD!).
However I do not know the passband rejection of the above filter at
1268 Mhz. I have mailed Bert and he has replied the loss / rejection
is 0.99 dB – I think he slightly misunderstood my question to him.
Has anybody measured the rejection at 1268 of one of his filters? His
current web site does not appear to display the filter response and I
am sure it used to.
Cheers
Simon G8ATB

<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=oa-4885-a>
Virus-free. www.avg.com
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=oa-4885-a>


<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>


--
vry 73
Pete GM4BYF

Join UKMicrowaves@groups.io to automatically receive all group messages.