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Transverter with Common IF

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Kent Tannery

Transverter with Common IF

I am trying to use my K2/100 (K60XV transverter interface installed) with a Down East Microwave 900mhz transverter which has only a "common" IF (not a TX IF and RX IF). The transverter requires low power IF around 0.10 miliwatts. (Transmitting has been tested and works fine)

The problem is that the DEMI transverter has a common IF and the K2 has seperate TX and RX IFs. I phoned Elecraft today and they suggested trying to modify the transverter to pull the RX IF seperately.

Anyone have any other solutions or ideas?

KD5SHM
Kent
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Dave Sublette

Re: Transverter with Common IF

Just use a G6Y relay and key it with an input from the K2 and switch the
commom input of the transverter between T and R connectors of the K2 at
the appropriate times. It is simpler than trying to modify the DEM
transverter.

Dave, K4TO

Kent Tannery wrote:

>I am trying to use my K2/100 (K60XV transverter interface installed) with a Down East Microwave 900mhz transverter which has only a "common" IF (not a TX IF and RX IF). The transverter requires low power IF around 0.10 miliwatts. (Transmitting has been tested and works fine)
>
> The problem is that the DEMI transverter has a common IF and the K2 has seperate TX and RX IFs. I phoned Elecraft today and they suggested trying to modify the transverter to pull the RX IF seperately.
>
> Anyone have any other solutions or ideas?
>
> KD5SHM
> Kent
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>
>

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wayne burdick

Re: Transverter with Common IF

Administrator

Kent Tannery wrote:

> I am trying to use my K2/100 (K60XV transverter interface installed)
> with a Down East Microwave 900mhz transverter which has only a
> "common" IF (not a TX IF and RX IF). The transverter requires low
> power IF around 0.10 miliwatts. (Transmitting has been tested and
> works fine)
> The problem is that the DEMI transverter has a common IF and the K2
> has seperate TX and RX IFs.

Kent,

You should be able to simply use a "Y" RCA adapter to tie the
transverter IN and OUT jacks in parallel. Then route the resulting
single cable to the transverter.

If this doesn't work, please let me know -- it should. It should also
be documented in the XV series manual. If not, it was an oversight on
my part. We'll add an errata item.

73,
Wayne
N6KR

---

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Don Wilhelm-3

RE: Re: Transverter with Common IF

A short jumper wire across the connector wiring points on the K60XV board
would do the same as the Y adapter and be just as easy - one less connector
point to cause future problems IMHO.

73,
Don W3FPR

> -----Original Message-----

> Kent Tannery wrote:
>
> > I am trying to use my K2/100 (K60XV transverter interface installed)
> > with a Down East Microwave 900mhz transverter which has only a
> > "common" IF (not a TX IF and RX IF). The transverter requires low
> > power IF around 0.10 miliwatts. (Transmitting has been tested and
> > works fine)
> > The problem is that the DEMI transverter has a common IF and the K2
> > has seperate TX and RX IFs.
>
> Kent,
>
> You should be able to simply use a "Y" RCA adapter to tie the
> transverter IN and OUT jacks in parallel. Then route the resulting
> single cable to the transverter.
>
> If this doesn't work, please let me know -- it should. It should also
> be documented in the XV series manual. If not, it was an oversight on
> my part. We'll add an errata item.
>
> 73,
> Wayne
> N6KR
>
>

Dave Mueller-3

Re: Transverter with Common IF

In reply to this post by Kent Tannery

DEMI has a zipped PowerPoint presentation entitled "Interfacing Transverters with the Elecraft K2 Transceiver".

http://www.downeastmicrowave.com/K2.zip

I don't have a PP viewer installed to look at it, so I'm not sure if this is a "better" solution than tying the TX and RX paths together in the K2.

Dave AA3EE

>From: Kent Tannery <[hidden email]>
>Date: Mon Jan 16 19:29:29 CST 2006
>To: [hidden email]
>Subject: [Elecraft] Transverter with Common IF

wayne burdick

Re: Transverter with Common IF

Administrator

In reply to this post by Don Wilhelm-3

True enough, Don. Thanks for mentioning this.

Of course the external "Y" cable has the advantage of being quickly
removed if one wanted to use a different transverter.

73,
Wayne
N6KR

On Jan 17, 2006, at 7:00 AM, Don Wilhelm wrote:

> A short jumper wire across the connector wiring points on the K60XV
> board
> would do the same as the Y adapter and be just as easy - one less
> connector
> point to cause future problems IMHO.
>
> 73,
> Don W3FPR

---

http://www.elecraft.com

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Kent Tannery

Re: Transverter with Common IF

I am now curious if the "Y" RCA cable connector on the K2's Transverter option will also work for the menu setting of "High Power" on the Transverter (H0.1 - H12.7 watts) or does this only apply for the Low Power setting of milliwatts?
Kent
KD5SHM

wayne burdick <[hidden email]> wrote:
True enough, Don. Thanks for mentioning this.

Of course the external "Y" cable has the advantage of being quickly
removed if one wanted to use a different transverter.

73,
Wayne
N6KR

On Jan 17, 2006, at 7:00 AM, Don Wilhelm wrote:

> A short jumper wire across the connector wiring points on the K60XV
> board
> would do the same as the Y adapter and be just as easy - one less
> connector
> point to cause future problems IMHO.
>
> 73,
> Don W3FPR

---

http://www.elecraft.com

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wayne burdick

Re: Transverter with Common IF

Administrator

This would only apply to the lower-power settings, Kent. The "H"
settings only apply to the K2's main antenna jack.

73,
Wayne
N6KR

On Jan 17, 2006, at 3:06 PM, Kent Tannery wrote:

> I am now curious if the "Y" RCA cable connector on the K2's
> Transverter option will also work for the menu setting of "High Power"
> on the Transverter (H0.1 - H12.7 watts) or does this only apply for
> the Low Power setting of milliwatts?
> Kent
> KD5SHM
>
> wayne burdick <[hidden email]> wrote:
>> True enough, Don. Thanks for mentioning this.
>>
>> Of course the external "Y" cable has the advantage of being quickly
>> removed if one wanted to use a different transverter.
>>
>> 73,
>> Wayne
>> N6KR

>> ---

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