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Transverter question

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W9DHI

Transverter question

I'm helping a friend out who bought a 222 transverter from Elecraft but
wants to use it with his TS850S. The 850 will only go down to 9 watts and
the Elecraft wants a max of 8 watts, any help out there???

Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA, WERA and ORC

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Trevor Day

Re: Transverter question

I don't have an 850S, but you could try an external negative dc supply
(say -9v to 0v) on the radios ALC input. That should vary the output
from zero upwards.

Most of the Kenwood range have a Din socket transverter port on the rear
apron which outputs a couple of milliwatts or so although I suspect this
may be too little drive for the 222 or you would be using it :-)

gl
Trev G3ZYY

In message <002901c486d1$d701e910$0300a8c0@DESK>, W9DHI
<[hidden email]> writes

>I'm helping a friend out who bought a 222 transverter from Elecraft but
>wants to use it with his TS850S. The 850 will only go down to 9 watts and
>the Elecraft wants a max of 8 watts, any help out there???
>
>
>Gregg R. Lengling, W9DHI, Retired
>Administrator http://www.milwaukeehdtv.org
>K2/100 S#3075 KX1 S# 57
>Member: ARRL, RSGB, RCA, WERA and ORC
>
>
>
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>

Don Brown-4

Re: Transverter question

In reply to this post by W9DHI

Hi

If the Kenwood has a low level transverter output then you can set up the jumpers for 0 to 1 MW input. Another option would be to build a 50 ohm 3 db power attenuator on the output of the Kenwood. There are several designs in the back of the ARRL handbook. The low level out is the best way to do if the Kenwood has it and I think it does.

Don Brown

KD5NDB

----- Original Message -----
From: W9DHI<mailto:[hidden email]>
To: [hidden email]<mailto:[hidden email]>
Sent: Friday, August 20, 2004 11:22 AM
Subject: [Elecraft] Transverter question

I'm helping a friend out who bought a 222 transverter from Elecraft but
wants to use it with his TS850S. The 850 will only go down to 9 watts and
the Elecraft wants a max of 8 watts, any help out there???

Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org<http://www.milwaukeehdtv.org/>
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA, WERA and ORC

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KK7P

RE: Transverter question

> I'm helping a friend out who bought a 222 transverter from
> Elecraft but wants to use it with his TS850S. The 850 will
> only go down to 9 watts and the Elecraft wants a max of 8
> watts, any help out there???

The TS-850S doesn't have such an output, at least not according to the
manual that came with mine. So you need to make or acquire an attenuator as
Don suggested.

However, you might want to consider a 20 dB attenuator, just in case you
accidentally forget to lower the TS-850S power when you go from HF to the
transverter. You can still run the TS-850S at 10 watts or so and keep the
XV-222 happy, but your XV-222 may be better protected this way.

This'll keep things running until your friend sees the light and gets a K2
:-)

Enjoy!

Lyle KK7P

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Trevor Day

Re: Transverter question

I was so surprised Lyle that I have just downloaded the manual to see
for myself :-) Sure enough, no transverter port! It does have the
usual linear amp switching though including ALC input (remote connector
pin 6). I personally find this a more elegant solution than the
attenuator as well as being much easier to implement. If the ALC
voltage is tied to the transverter on/off switching, then it should
automatically reduce the power only when needed. Not totally foolproof,
but should work.

Trev G3ZYY

In message <[hidden email]>, Lyle Johnson
<[hidden email]> writes

>> I'm helping a friend out who bought a 222 transverter from
>> Elecraft but wants to use it with his TS850S. The 850 will
>> only go down to 9 watts and the Elecraft wants a max of 8
>> watts, any help out there???
>
>The TS-850S doesn't have such an output, at least not according to the
>manual that came with mine. So you need to make or acquire an attenuator as
>Don suggested.
>
>However, you might want to consider a 20 dB attenuator, just in case you
>accidentally forget to lower the TS-850S power when you go from HF to the
>transverter. You can still run the TS-850S at 10 watts or so and keep the
>XV-222 happy, but your XV-222 may be better protected this way.
>
>This'll keep things running until your friend sees the light and gets a K2
>:-)
>
>Enjoy!
>
>Lyle KK7P
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
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>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>

Ron D'Eau Claire-2

RE: Transverter question

In reply to this post by KK7P

Of course you don't want to add an attenuator in the receive signal path. .

The XV Transverter uses a simple resistive L-net attenuator inside on the TX
circuit side of the Transmit/Receive switch. The attenuator is switched into
the circuit that by jumpers when needed.

The first question I'd ask is to Elecraft about how much "overhead" was
allowed in the attenuator design. You said the Kenwood would crank down to
about 9 watts - 1 watt above the maximum specified. I'd be astonished if the
attenuator design didn't allow for a 15% variation in the maximum input
allowed.

Even if not, the place for a "heavier" attenuator is in the same point where
the existing one is in the circuit. You can connect it easily using the
jumpers already provided to avoid cutting any trances or in any way changing
the basic XV circuit. There's lots of room inside the XV case. I bet you
could build one to ride "piggyback" in the same box.

Be sure to use non-inductive resistors. Metal film are good normally. Keep
the leads short and connect it via the jumper pins on the board.

Ron AC7AC

-----Original Message-----

> I'm helping a friend out who bought a 222 transverter from Elecraft
> but wants to use it with his TS850S. The 850 will only go down to 9
> watts and the Elecraft wants a max of 8 watts, any help out there???

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Trevor Day <Trev@secornwall.com>(by way of Rick Sharpe)

Re: Transverter question

In reply to this post by W9DHI

I was so surprised Lyle that I have just downloaded the manual to see for
myself :-) Sure enough, no transverter port! It does have the usual
linear amp switching though including ALC input (remote connector pin
6). I personally find this a more elegant solution than the attenuator as
well as being much easier to implement. If the ALC voltage is tied to the
transverter on/off switching, then it should automatically reduce the power
only when needed. Not totally foolproof, but should work.

Trev G3ZYY

In message <[hidden email]>, Lyle Johnson
<[hidden email]> writes

>>I'm helping a friend out who bought a 222 transverter from
>>Elecraft but wants to use it with his TS850S. The 850 will
>>only go down to 9 watts and the Elecraft wants a max of 8
>>watts, any help out there???
>
>The TS-850S doesn't have such an output, at least not according to the
>manual that came with mine. So you need to make or acquire an attenuator as
>Don suggested.
>
>However, you might want to consider a 20 dB attenuator, just in case you
>accidentally forget to lower the TS-850S power when you go from HF to the
>transverter. You can still run the TS-850S at 10 watts or so and keep the
>XV-222 happy, but your XV-222 may be better protected this way.
>
>This'll keep things running until your friend sees the light and gets a K2
>:-)
>
>Enjoy!
>
>Lyle KK7P
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

--
Trevor Day
SIP: [hidden email]

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k6dgw

Re: Transverter question

In reply to this post by Trevor Day

FWIW: Years ago, I used a transverter in satellite work that smoked
with more than about 2W input. I fed my 30S1 into the Heath Cantenna,
and tapped what I needed off a little RC voltage divider.

Trevor Day wrote:

>
> I don't have an 850S, but you could try an external negative dc supply
> (say -9v to 0v) on the radios ALC input. That should vary the output
> from zero upwards.
>
> Most of the Kenwood range have a Din socket transverter port on the rear
> apron which outputs a couple of milliwatts or so although I suspect this
> may be too little drive for the 222 or you would be using it :-)
>
> gl
> Trev G3ZYY
>
> In message <002901c486d1$d701e910$0300a8c0@DESK>, W9DHI
> <[hidden email]> writes
> >I'm helping a friend out who bought a 222 transverter from Elecraft but
> >wants to use it with his TS850S. The 850 will only go down to 9 watts and
> >the Elecraft wants a max of 8 watts, any help out there???
> >
> >
> >Gregg R. Lengling, W9DHI, Retired
> >Administrator http://www.milwaukeehdtv.org
> >K2/100 S#3075 KX1 S# 57
> >Member: ARRL, RSGB, RCA, WERA and ORC
> >
> >
> >
> >
> >
> >_______________________________________________
> >Elecraft mailing list
> >Post to: [hidden email]
> >You must be a subscriber to post to the list.
> >Subscriber Info (Addr. Change, sub, unsub etc.):
> >http://mailman.qth.net/mailman/listinfo/elecraft
> >Help: http://mailman.qth.net/subscribers.htm
> >Elecraft web page: http://www.elecraft.com
> >
>
> --
> Trevor Day
> SIP: [hidden email]
>
> _______________________________________________
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Don Brown-4

Re: Transverter question

In reply to this post by Ron D'Eau Claire-2

Hi

One simple mod you could do would be to change out the three 160 ohm 3 watt resistors in the internal dummy load with 160 ohm 5 watt resistors. This should allow you to go to 10-12 watts with no problem. You will need to use MOS type non inductive resistors. Mouser has them. I would stand them off away from the board a little more than shown in the manual to allow air around the resistors. They will get fairly hot.

Don Brown
----- Original Message -----
From: Ron D'Eau Claire<mailto:[hidden email]>
To: [hidden email]<mailto:[hidden email]>
Sent: Friday, August 20, 2004 6:06 PM
Subject: RE: [Elecraft] Transverter question

Of course you don't want to add an attenuator in the receive signal path. .

The XV Transverter uses a simple resistive L-net attenuator inside on the TX
circuit side of the Transmit/Receive switch. The attenuator is switched into
the circuit that by jumpers when needed.

The first question I'd ask is to Elecraft about how much "overhead" was
allowed in the attenuator design. You said the Kenwood would crank down to
about 9 watts - 1 watt above the maximum specified. I'd be astonished if the
attenuator design didn't allow for a 15% variation in the maximum input
allowed.

Even if not, the place for a "heavier" attenuator is in the same point where
the existing one is in the circuit. You can connect it easily using the
jumpers already provided to avoid cutting any trances or in any way changing
the basic XV circuit. There's lots of room inside the XV case. I bet you
could build one to ride "piggyback" in the same box.

Be sure to use non-inductive resistors. Metal film are good normally. Keep
the leads short and connect it via the jumper pins on the board.

Ron AC7AC

-----Original Message-----

> I'm helping a friend out who bought a 222 transverter from Elecraft
> but wants to use it with his TS850S. The 850 will only go down to 9
> watts and the Elecraft wants a max of 8 watts, any help out there???

_______________________________________________
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W9DHI

RE: Transverter question

In reply to this post by W9DHI

Just a thankyou to the many responses I got on the subject line. After
looking at the input circuit to the xverter and the attenuator section we
decided that 9 to 10 watts would probably be within limits. It turns out we
were correct. With 5 feet of RG58 style cable we drove the XV222 to 18
watts out and everything was working perfectly and normally. We then went
ahead and fed the Henry Amp and now have 120 watts out in time for the VHF
contest. I think Todd is very happy.

Now after actually playing with one of the XV's I've got to say it is an
excellent unit. The receive sensitivity is phenomenal (at 222.100 it is .04
for 12dB SINAD in the FM mode and in CW/SSB I had to attenuators to the
output of my service monitor to try to check it out and the service monitor
goes down to .02uV. Great unit, now I know what I want for Christmas.....a
6meter and 2meter Elecraft XV units.....(would someone tell my wife).

73 and thanks to all, again this reflector is a source of uncommon
knowledge.

Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA, WERA and ORC

-----Original Message-----
From: Duane Grotophorst [mailto:[hidden email]]
Sent: Friday, August 20, 2004 9:26 PM
To: [hidden email]
Subject: RE: [Elecraft] Transverter question

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Martin-85

Re: Transverter question

In reply to this post by W9DHI

Guys,
the TS 850 HAS a transverter output. Not the best solution IMO, but it
has.
There is a socket on the rear panel marked IF OUT. This delivers low level
output.
The discussion has been going on quite a while ago, so please check
the elecraft list archives from about May, 22nd through 27th. or so.

Also check www.mods.dk . There is a mod for safe low-level
transverter-operation for the TS-850. It is in german, but i have a
translation.

--
Best regards,
Martin

K2 #2706 mailto:[hidden email]

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Robert-223

Re: Re: Transverter question

www.mods.dk has bee suspended indefinitely.
I don't know what happened.

Robert VE3RPF

Martin wrote:

>Guys,
>the TS 850 HAS a transverter output. Not the best solution IMO, but it
>has.
>There is a socket on the rear panel marked IF OUT. This delivers low level
>output.
>The discussion has been going on quite a while ago, so please check
>the elecraft list archives from about May, 22nd through 27th. or so.
>
>Also check www.mods.dk . There is a mod for safe low-level
>transverter-operation for the TS-850. It is in german, but i have a
>translation.
>
>
>
>

Bob Boehmer

mods.dk site (was RE: Re: Transverter question)

Here is a temporary mirror site where you can access the mods.dk content:
http://mods.dyndns.dk/

And here is a usenet thread that explains a bit about what is happening
(it's a long link and I am sure Outlook will add line breaks):
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=p5n9i0hvml9gm7j6s
l3l9rantrln142fp5%404ax.com&rnum=1&prev=/groups%3Fq%3Dmods.dk%2Bsite%2Bdown%
26hl%3Den%26lr%3D%26ie%3DUTF-8%26selm%3Dp5n9i0hvml9gm7j6sl3l9rantrln142fp5%2
5404ax.com%26rnum%3D1

73,
Bob WB3FXC

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Robert
> Sent: Monday, August 23, 2004 11:16 AM
> To: Martin
> Cc: [hidden email]
> Subject: Re: [Elecraft] Re: Transverter question
>
>
> www.mods.dk has bee suspended indefinitely.
> I don't know what happened.
>
> Robert VE3RPF

Harvey, Stephen P.

RE: Re: Transverter question

In reply to this post by W9DHI

I connected to www.mods.dk without any problems. I just downloaded a Drake document from there.

73,

--Steve, NNØB

-----Original Message-----
From: Robert [mailto:[hidden email]]
Sent: Monday, August 23, 2004 10:16 AM
To: Martin
Cc: [hidden email]
Subject: Re: [Elecraft] Re: Transverter question

www.mods.dk has bee suspended indefinitely.
I don't know what happened.

Robert VE3RPF

Martin wrote:

>Guys,
>the TS 850 HAS a transverter output. Not the best solution IMO, but it
>has.
>There is a socket on the rear panel marked IF OUT. This delivers low
>level output.
>The discussion has been going on quite a while ago, so please check the
>elecraft list archives from about May, 22nd through 27th. or so.
>
>Also check www.mods.dk . There is a mod for safe low-level
>transverter-operation for the TS-850. It is in german, but i have a
>translation.
>
>
>
>

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