QUADRA and the K3

[ka9zap]

I'm using the Quadra amp I change bands using the RF sniffing method
which does work ok.

The Quadra needs to see at least 50 watts carrier
The Quadra needs to show the K3 a good swr so I switch in a dummy load
after the amp.
If the radio shuts down because of Hi SWR the F SET method will not work.
I press the [F SET] switch on the amp putting it into TRANSMIT then
press and hold
[XMIT] / tune until the amp switches bands, only takes a couple seconds.

Here is a link that you can use for the lash up you are looking for

http://www.ab4oj.com/quadra/w4uk.html

Look for and sign up for the Quadra Yahoo group there has been some
discussion there
on the lash up using band data 2 input. I believe there is a mod to the
amp that activates
the [INPUT] #2 to act and switch the band data info from the number 1
input which is a
change Yaesu left out for some reason. After this mod is done there will
then be radio control
from both band data inputs from two radios the control being switched
via the amp [INPUT]
button.
I do not remember where I saw this mod posted or by who.
I have the PTT and the ALC connected to the Quadra from the K3 the talk
power on ssb
is much higher than my ft2k so the ALC is a must. Before I connected the
ALC up even as
low as 20 watt SSB on the K3 sent the amp into high output I have no
issues controlling the amp
with the ALC from the D sub 15 pin connector, pin 5 and pin 15.

My K3 serial is #3142 its born on date is 6/13/09 for first qso, the K3
works well with the
VL-1000.

Regards
Art
ka9zap
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Joe Subich, W4TV-4]

> Look for and sign up for the Quadra Yahoo group there has
> been some discussion there on the lash up using band data 2
> input. I believe there is a mod to the amp that activates
> the [INPUT] #2 to act and switch the band data info from
> the number 1 input which is a change Yaesu left out for
> some reason.

The Quadra is designed to use the Exciter 1 RF input with
Band Data 1 (the DIN8/262 jack) and the Exciter 2 RF input
with Band Data 2 (the DB15).  The schematic shows that to
be the case as well.   The only issue that prevents using
the Quadra with two exciters and automatic band switching
is that the TF outputs activate for both exciters at the
same time.

The TF Set issue appears to be a late in the game change
(the relay that would have switched the TF signal was used
to switch a resistor to ground vs. contact closure to
ground in order to support the remote tune function on
the FT-1000MP.  In addition the second TF (tune) outputs
was used for the switched resistor instead of the second
exciter output.  The ground vs. resistor issue is also
the reason that the TF output needs to be changed for use
with the FT-2000/FT-9000 since the remote (keypad) tune
function was abandoned in those rigs in favor of a separate
dry contact input.

> I do not remember where I saw this mod posted or by who.

The K2ESE modification adds an external relay to restore
the missing TF switching function.  It is available at
mods.dk as well as the files area of the YAESUQUADRA
group on Yahoo.  The mod is only necessary in order to
use the TF function with two exciters and the Quadra.

73,

   ... Joe, W4TV
 
 

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of ka9zap
> Sent: Thursday, July 09, 2009 4:13 PM
> To: [hidden email]
> Subject: [Elecraft] QUADRA and the K3
>
>
> I'm using the Quadra amp I change bands using the RF sniffing
> method which does work ok.
>
> The Quadra needs to see at least 50 watts carrier
> The Quadra needs to show the K3 a good swr so I switch in a
> dummy load
> after the amp.
> If the radio shuts down because of Hi SWR the F SET method
> will not work. I press the [F SET] switch on the amp putting
> it into TRANSMIT then
> press and hold
> [XMIT] / tune until the amp switches bands, only takes a
> couple seconds.
>
> Here is a link that you can use for the lash up you are looking for
>
> http://www.ab4oj.com/quadra/w4uk.html
>
> Look for and sign up for the Quadra Yahoo group there has been some
> discussion there
> on the lash up using band data 2 input. I believe there is a
> mod to the
> amp that activates
> the [INPUT] #2 to act and switch the band data info from the number 1
> input which is a
> change Yaesu left out for some reason. After this mod is done
> there will
> then be radio control
> from both band data inputs from two radios the control being switched
> via the amp [INPUT]
> button.
> I do not remember where I saw this mod posted or by who.
> I have the PTT and the ALC connected to the Quadra from the
> K3 the talk
> power on ssb
> is much higher than my ft2k so the ALC is a must. Before I
> connected the
> ALC up even as
> low as 20 watt SSB on the K3 sent the amp into high output I have no
> issues controlling the amp
> with the ALC from the D sub 15 pin connector, pin 5 and pin 15.
>
> My K3 serial is #3142 its born on date is 6/13/09 for first
> qso, the K3
> works well with the
> VL-1000.
>
> Regards
> Art
> ka9zap

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html