Where can I find documentation on the Orion II Headphone RFI Filter? My rig
was shipped on 12/13/05 and received 12/15/05. I have made no
modifications, only firmware updates. MY O2 needs this modification. Fred,
AB8AH
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of pfizenmayer
Sent: Friday, May 01, 2009 12:36 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Orion 2 Headphone RFI Filter
I do not have time right now to dig out the schematic and see if this would
allow an external check - but I can tell you the filter adds 24 ohms DCR in
each side of the headphone output. If you want to do the exercise -
measure open circuit voltage of the sidetone - then load with 32 ohms or so
and measure the voltage again - You can calculate source impedance . Do this
on both and you will tell if it has the filter . A no filter will be at
least 24 ohms lower output impedance.
I think I have that data - but will not have time until this evening to dig
it out or remeasure.
73 de Hank K7HP
----- Original Message -----
From: "Dick Williams" <k8ztt@mho.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, May 01, 2009 7:47 AM
Subject: Re: [TenTec] Orion 2 Headphone RFI Filter
> Doug,
>
> I am not sure when the started; but if you don't receive a satisfactory
> answer on here, since you installed one in your radio, it might be easiest
> to take a quick look inside your friends radio. That way you can verify
> for
> sure if one is (or is not) installed.
>
> Dick K8ZTT
>
>
> ----- Original Message -----
> From: "Doug Turnbull" <turnbull@net1.ie>
> To: <tentec@contesting.com>
> Sent: Friday, May 01, 2009 7:48 AM
> Subject: [TenTec] Orion 2 Headphone RFI Filter
>
>
>>I have a friend who is purchasing an Orion 2 from another EI ham this
>>week.
>> Can anyone tell me at what serial number TT first introduced the
>> headphones
>> RFI filter? I installed one in my radio eighteen months or two years
>> ago.
>> I do not know the exact age of this radio but want to insure that EI2JD
>> is
>> fully sorted. 73 Doug EI2CN
>>
>> _______________________________________________
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>
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