[Moon] Best IF for 23 cm transverter

John Worsnop johnworsnop at gmail.com
Thu Jul 26 12:40:27 CEST 2018


I use a high performance 144MHz / 28MHz Anglian transverter between a K3
and my transverters. Anglian was in Dubus. Cheap. High performance. See
g4ddk.com.

73 John

On Thu, 26 Jul 2018, 11:27 Zdenek SAMEK-OK1DFC via Moon, <
moon at moonbounce.info> wrote:

> Why do not use 28MHz? HF TRX has always higer stability, especially if you
> expect to use it on MW for EME with JT or QRA. I am using at home IC7700 28
> MHz as IF, on portable IC9100 but with GPS LO locked oscillator. Cavity
> filter you will need anyway.
>
> --
> Zdenek - OK1DFC
> www.ok1dfc.com
> QRV EME 144 MHz - 10 GHz
> WAC 432 - 1296 - 2320 MHz
> WAZ #9 - WAS 432 #29
> DXCC 432 - 1296 MHz
>
> ---------- Původní e-mail ----------
> Od: Don Hawbaker via Moon <moon at moonbounce.info>
> Komu: Ton PA0TBR <pa0tbr at mubo.nl>, moon at moonbounce.info
> Datum: 26. 7. 2018 11:14:46
> Předmět: Re: [Moon] Best IF for 23 cm transverter
> "
>
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>
> Why do you want to use 28 MHz?  As you say, many suppliers use 144, so I
> do
> not see any advantages in using 28.
>
>
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> On Thu, Jul 26, 2018 at 3:49 AM -0400, "Ton PA0TBR via Moon" <moon@
> moonbounce.info> wrote:
>
>
>
>
>
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>
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>
>
> I want to convert 1296 MHz to/from 28 MHz (or higher but less than 54 MHz).
> I see 2 options:
>
> 1) Kuhne has transverters that will convert directly to/from 28 MHz but I
> assume that I need interdigital filters to stop the 1268 MHz mixer
> frequency and 1240 MHz image frequency.
>
> 2) Many suppliers mix to/from 144 MHz, which implies that I need a 2nd
> transverter for 144 to/from 28 MHz.
>
> Which option is technically preferred?
>
> 73,
> Ton pa0tbr
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