Thanks, Frank.  That's interesting because the shield is usually grounded.  I 
guess this means I'm muting the Jupiter speaker when I connect the K3s because 
I'm  grounding the floating Jupiter speaker circuit to the K3s ground.  73 de 
Carl, N8VZ

Sent from my iPhone

> On Oct 21, 2015, at 6:29 AM, "kg9hfr...@gmail.com" <kg9hfr...@gmail.com> 
> wrote:
> 
> 
> Carl, see Jupiter manual, text on I-1
> Ungrounded speaker, speakers terminals balanced load.
> Frank, KG9H
> 
> 
>> On Oct 21, 2015, at 12:39 AM, Vic Rosenthal <k2vco....@gmail.com> wrote:
>> 
>> There is a high pass filter in the K3 to protect the t/r switch. It is in 
>> the circuit to the main antenna input. To listen to the bc band you should 
>> use the rx antenna input which is after the h/p filter.
>> 
>> Vic 4X6GP/K2VCO
>> Sent from my phone
>> 
>>> On Oct 21, 2015, at 1:36, Carl Jón Denbow <c...@n8vz.com> wrote:
>>> 
>>> I recently installed a KBPF3A in the sub receiver.  I've been surprised to 
>>> discover on direct A/B comparisons using the same antenna that my old TT 
>>> Jupiter is much more sensitive on the broadcast band.  A station that comes 
>>> in at S-6 on the Jupiter is maybe an S-2 on the K3s.   This is very 
>>> noticeable to the ear, as you might imagine.  I'm wondering if anyone else 
>>> has noticed that the KBPF3A is not exactly optimized for the broadcast band.
>>> 
>>> Also, I have another issue related to the Jupiter and the K3s.  I tried to 
>>> install my new SP3 so that I could switch between using it with the K3s and 
>>> the Jupiter with the front switch.  However, when I hook the K3s to the SP3 
>>> when the Jupiter is connected, it immediately mutes the speaker.  I can 
>>> then switch to the K3s connection, and it's working fine.  Switch to the 
>>> Jupiter and it's muted, unless I physically disconnect the K3s in the back 
>>> of the SP3.   I've looked at the rather simple schematic of the SP3, and I 
>>> can't figure out why this is happening.  It appears to me that something 
>>> must be shorting ring and sleeve in the K3s, but I can't exactly figure out 
>>> how his can be happening.  Any help would be appreciated.
>>> 
>>> 73,
>>> 
>>> Carl
>>> -- 
>>> =================================================
>>> Carl Jón Denbow, N8VZ
>>> 17 Coventry Lane
>>> Athens, Ohio 45701-3718
>>> 
>>> c...@n8vz.com
>>> www.n8vz.com
>>> EM89wh
>>> 
>>> IRLP 4533   Echolink 116070
>>> 
>>> PSK and JT65 Forever!
>>> =================================================
>>> 
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>> ______________________________________________________________
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