K3 - Accessory Jack - How Many Wye Cables?

[Richard Thorne-4]

Currently I have a wye cable attached to the accessory jack on the back
of my K3 which in turn is connected to a microham device and the KAT-500
tuner.

I have a need to supply band data to another device, can I connect
another wye to the current wye so I can connect 3 devices to the
accessory jack?

Thanks

Rich - N5ZC

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[Peter Chamalian W1RM]

Yes so long as you aren't trying to send the same data to two devices.  If
you are trying to send band data to two devices, I'm not sure if that would
work or not.

Currently I have one which provides my amp with band data and the other side
to my 6m preamp.  I wanted to add RTTY from my MicroKeyer II and that comes
via the ACC line so I'm awaiting the arrival of a second Wye for that.  All
three "ports" are independent data so no conflict.


Pete, W1RM

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of
Richard Thorne
Sent: Monday, May 12, 2014 7:48 AM
To: Elecraft Reflector
Subject: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?

Currently I have a wye cable attached to the accessory jack on the back of
my K3 which in turn is connected to a microham device and the KAT-500 tuner.

I have a need to supply band data to another device, can I connect another
wye to the current wye so I can connect 3 devices to the accessory jack?

Thanks

Rich - N5ZC

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[Don Wilhelm-4]

Rich,

I assume you also have a KPA500 in the mix.
The problem is not with adding another "Y" cable, but the possibility
that the other device will interfere with the band signalling to the KPA500.
If that other device has pullup resistors, that can create problems,
especially if the pullups are to some voltage other than 5 volts. You
may have to add isolating diodes to that device (the KPA500 does have
those protection diodes on the band data lines).

If it has no pullup resistors, then it may be OK.

73,
Don W3FPR

On 5/12/2014 7:48 AM, Richard Thorne wrote:
> Currently I have a wye cable attached to the accessory jack on the
> back of my K3 which in turn is connected to a microham device and the
> KAT-500 tuner.
>
> I have a need to supply band data to another device, can I connect
> another wye to the current wye so I can connect 3 devices to the
> accessory jack?
>

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[w0mu]

This is an issue.  If you have a band decoder, want to run the preamp,
the amp, tuner, and say a Microham device.  I have used multiple Y
adapters successfully.

Mike W0MU

On 5/12/2014 6:04 AM, Don Wilhelm wrote:

> Rich,
>
> I assume you also have a KPA500 in the mix.
> The problem is not with adding another "Y" cable, but the possibility
> that the other device will interfere with the band signalling to the
> KPA500.
> If that other device has pullup resistors, that can create problems,
> especially if the pullups are to some voltage other than 5 volts. You
> may have to add isolating diodes to that device (the KPA500 does have
> those protection diodes on the band data lines).
>
> If it has no pullup resistors, then it may be OK.
>
> 73,
> Don W3FPR
>
> On 5/12/2014 7:48 AM, Richard Thorne wrote:
>> Currently I have a wye cable attached to the accessory jack on the
>> back of my K3 which in turn is connected to a microham device and the
>> KAT-500 tuner.
>>
>> I have a need to supply band data to another device, can I connect
>> another wye to the current wye so I can connect 3 devices to the
>> accessory jack?
>>
>
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[Dick Dievendorff-4]

I use two Ys.  One side of the first Y  goes from a K3  to a KAT500 and then
the KAT500 goes to a KPA500.  The other side of the K3 Y goes to a second Y
that connects to a Top Ten Devices Band Aide and a US Interface Navigator.  

Occasionally with the K3 turned off my Top Ten Devices Band Aide relays buzz
a bit.  I haven't figured out why. But I leave the Band Aide antenna switch
in one of the "non auto" settings when the K3 is powered off.  I think the
solution might  be to power the Band Aide from a power strip controlled by
the K3 power switch, or Y the P3 power connector.  Or perhaps add some
high-Z pullups on the band lines in the Band Aide.  As Don mentions, pullups
can be an issue, particularly when some devices are not always powered.

No problem thus far with band voltages when the K3 is powered on. I leave my
KAT500 powered (although I usually push the front panel power button to turn
the LEDs off).  When the KAT500 has DC power, the Band lines and AUXBUS are
pulled up (using what the microcontroller data sheets call  "weak pullups"),
which draw only microAmperes. The KAT500 sleeps when its power is off, which
is a very low current draw, but it wakes up when you press the DC power
(MODE) button.

73 de Dick, K6KR


-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of
Richard Thorne
Sent: Monday, May 12, 2014 4:48 AM
To: Elecraft Reflector
Subject: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?

Currently I have a wye cable attached to the accessory jack on the back of
my K3 which in turn is connected to a microham device and the KAT-500 tuner.

I have a need to supply band data to another device, can I connect another
wye to the current wye so I can connect 3 devices to the accessory jack?

Thanks

Rich - N5ZC

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[Jim Miller]

I made a patch panel using adapters mounted on DIN rails from Winford Engineering.

73

Jim ab3cv

On May 12, 2014, at 9:49 AM, W0MU Mike Fatchett <[hidden email]> wrote:

This is an issue.  If you have a band decoder, want to run the preamp, the amp, tuner, and say a Microham device.  I have used multiple Y adapters successfully.

Mike W0MU

> On 5/12/2014 6:04 AM, Don Wilhelm wrote:
> Rich,
>
> I assume you also have a KPA500 in the mix.
> The problem is not with adding another "Y" cable, but the possibility that the other device will interfere with the band signalling to the KPA500.
> If that other device has pullup resistors, that can create problems, especially if the pullups are to some voltage other than 5 volts. You may have to add isolating diodes to that device (the KPA500 does have those protection diodes on the band data lines).
>
> If it has no pullup resistors, then it may be OK.
>
> 73,
> Don W3FPR
>
>> On 5/12/2014 7:48 AM, Richard Thorne wrote:
>> Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner.
>>
>> I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack?
>
> ______________________________________________________________
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[Richard Thorne-4]

Thanks for all the replies,

I plan on connecting a band decoder to the 2nd wye and it only
receives/monitors the band data, it doesn't send anything back to the
rig.  So it looks like a 2nd wye should do the trick.

Thanks

Rich - N5ZC

On 5/12/2014 6:48 AM, Richard Thorne wrote:

> Currently I have a wye cable attached to the accessory jack on the
> back of my K3 which in turn is connected to a microham device and the
> KAT-500 tuner.
>
> I have a need to supply band data to another device, can I connect
> another wye to the current wye so I can connect 3 devices to the
> accessory jack?
>
> Thanks
>
> Rich - N5ZC
>
> ______________________________________________________________
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[Don Wilhelm-4]

Rich,

Power up your planned band decoder standalone and measure the voltage at
its band data inputs.  If you see zero volts (or very close to that),
then it will be OK as long as those inputs will not source too much
current when the K3 band data lines are low.

OTOH, if you measure a voltage with the band decoder standalone, it may
cause problems.

In a system with pullup resistors at the drivers, there is always a
concern for noise introduced on the signal line with additional
receivers, so even if your added band decoder works OK, keep an eye on
the KPA500 band selection long enough to be certain there are no strange
behaviors introduced by the added decoder.

73,
Don W3FPR

On 5/12/2014 12:43 PM, Richard Thorne wrote:
> Thanks for all the replies,
>
> I plan on connecting a band decoder to the 2nd wye and it only
> receives/monitors the band data, it doesn't send anything back to the
> rig.  So it looks like a 2nd wye should do the trick.
>

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[Oliver Dröse]

I have up to 5 devices fed in parallel with the same BCD sigs from my K3
(my KPA500, a 5B4AGN TXBPF, my 10x2 homebrew antenna switch, a homebrew
sequencer that also splits PTT between HF & VHF based on BCD and
sometimes an additional homebrew banddecoder, too). So no problem at all
to parallel things as long as the devices used are designed correctly,
i.e. inputs isolated and thus no "feedback" to the other devices.

73, Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 12.05.2014 13:53, schrieb Peter Chamalian W1RM:

> Yes so long as you aren't trying to send the same data to two devices.  If
> you are trying to send band data to two devices, I'm not sure if that would
> work or not.
>
> Currently I have one which provides my amp with band data and the other side
> to my 6m preamp.  I wanted to add RTTY from my MicroKeyer II and that comes
> via the ACC line so I'm awaiting the arrival of a second Wye for that.  All
> three "ports" are independent data so no conflict.
>
>
> Pete, W1RM
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of
> Richard Thorne
> Sent: Monday, May 12, 2014 7:48 AM
> To: Elecraft Reflector
> Subject: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
>
> Currently I have a wye cable attached to the accessory jack on the back of
> my K3 which in turn is connected to a microham device and the KAT-500 tuner.
>
> I have a need to supply band data to another device, can I connect another
> wye to the current wye so I can connect 3 devices to the accessory jack?
>
> Thanks
>
> Rich - N5ZC
>
> ______________________________________________________________
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[Rick Tavan N6XI]

I have a K3 ACC connector wye-connected to two Top Ten band decoders and a
KAT500 which in turn feeds a KPA500. No perceived problems with band data
fanout.

73,

/Rick N6XI


On Mon, May 12, 2014 at 4:48 AM, Richard Thorne <[hidden email]> wrote:

> Currently I have a wye cable attached to the accessory jack on the back of
> my K3 which in turn is connected to a microham device and the KAT-500 tuner.
>
> I have a need to supply band data to another device, can I connect another
> wye to the current wye so I can connect 3 devices to the accessory jack?
>
> Thanks
>
> Rich - N5ZC
>
> ______________________________________________________________
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>

--
Rick Tavan N6XI
Truckee, CA
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[Mike VE3YF]

One question, is there a particular Y cable I should be looking at or
will any Y (Wye) cable work, ie for Video Card to Dual Monitors. They
both have the DB15 connectors.


73 De Mike
VE3YF

http://www.ve3yf.com
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[Mike VE3YF]

I stand corrected, I have found a Wye cable that uses the following:

1 x D-Sub (HD-15) Male, 2 x D-Sub (HD-15) Female



73 De Mike
VE3YF

http://www.ve3yf.com
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[Don Wilhelm-4]

Mike,

Any "Y" cable that has all 15 conductors connected straight through with
none connected to another pin will work.
A "VGA" Y cable will not work because it has several conductors
connected together.  An SVGA "Y" cable should have all conductors
independent, but verify that with the cable supplier or check with your
ohmmeter if you already have one in hand.

73,
Don W3FPR

On 5/19/2014 8:52 PM, Mike VE3YF wrote:
> One question, is there a particular Y cable I should be looking at or
> will any Y (Wye) cable work, ie for Video Card to Dual Monitors. They
> both have the DB15 connectors.
>

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[Mike VE3YF]

Hi Don:

I will have to verify the cable once it arrives as it was listed as a
SVGA Cable but it was fairly cheap and off eBay. I guess only time will
tell.

To the group, does anyone have a good reliable source for the cable. Tnx.


73 De Mike
VE3YF

http://www.ve3yf.com
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[Joe Subich, W4TV-4]

 From the archives:

> The full DB15HD Y cables available from:
>   www.cablewholesale.com  p/n 10H1-27708
>   www.altex.com Philmore 70-568
 >
>   or one of the breakout boards from:
>   http://www.winfordeng.com/products/cat_brk.php
>   the BRKSD15HDM-C is particularly interesting:
>     http://www.winfordeng.com/products/brksd15hd.php

I just checked both Altex and Cable Wholesale ... the Y cables
are still listed for $7.99 and $3.89 respectively.
The Winford BRKSD15HDM-C is $17.00.

Winford also have a board with one male DB15HD, one female DB15HD,
a 16 position terminal strip and fivw solder connection holes per
line to their product mix:
      http://www.winfordeng.com/products/brk15hdmf.php

BRK15HDMF-S-FT (with mounting feet) is $22.00.
BRK15HDMF-S-DIN (for DIN Rail mounting) is $23.00

73,

    ... Joe, W4TV


On 2014-05-20 6:06 AM, Mike VE3YF wrote:

> Hi Don:
>
> I will have to verify the cable once it arrives as it was listed as a
> SVGA Cable but it was fairly cheap and off eBay. I guess only time will
> tell.
>
> To the group, does anyone have a good reliable source for the cable. Tnx.
>
>
> 73 De Mike
> VE3YF
>
> http://www.ve3yf.com
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[Mike VE3YF]

Tnx Joe:

As always, wealth of information.


73 De Mike
VE3YF

http://www.ve3yf.com
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[Eric Swartz - WA6HHQ]

elecraft.com  :-)

We also sell the Y cable (E980190) and aux-only cable (E850463) as separate items.

73,
Eric
elecraft.com
_..._
> On May 20, 2014, at 3:06 AM, Mike VE3YF <[hidden email]> wrote:
>
> Hi Don:
>
> I will have to verify the cable once it arrives as it was listed as a SVGA Cable but it was fairly cheap and off eBay. I guess only time will
> tell.
>
> To the group, does anyone have a good reliable source for the cable. Tnx.
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