[RTTY] SPOT:SV2ASP/A 18.107.6 RTTY

[Kostas Stamatis]

the tnc is used by Monk Apollo is donated by NCDXA some years ago and it is 
a PTCii.
DL5EBE has made the setup for him but probably forgot to change the shift.
If anyone know how to change the shift from 200 to 170 on this tnc, let's 
send me an email.
73 Kostas SV1DPI

----- Original Message ----- 
From: "Mike Fatchett W0MU" <w0mu at w0mu.com>
To: <rtty at contesting.com>
Sent: Saturday, April 30, 2011 3:13 AM
Subject: Re: [RTTY] SPOT:SV2ASP/A 18.107.6 RTTY


> Sounds like one of the DX Associations should be sending out a care
> package to Monk Apollo.
>
> On 4/29/2011 6:01 PM, Michael Haack wrote:
>> I had one and did the mod.
>> And that modification works.
>> While it limits you to 170 Hz shift on all modes, it does make a 
>> difference.
>>
>> 73 de Mike, WB9B
>>
>>
>>
>>
>> On 04/29/2011 1:51 PM, Joe Subich, W4TV wrote:
>>> AMTOR or not, the PK-232 was designed primarily for HF Packet and
>>> uses 200 Hz shift for both transmit and receive on HF.  The modem is
>>> a typical 1980's filter/slicer for receive (multiple stages of op-
>>> amp based filters) and a PLL for transmit.  "Nominal" HF tones are
>>> 2110/2310 Hz.
>>>
>>> There is a modification for the PK-232 that will convert it to
>>> 170 Hz (http://www.qsl.net/k0bx/align.htm).  The modification
>>> involves replacing four resistors (in the receive filter) and
>>> aligning the AFSK generator for 170 Hz (to 2125/2295).
>>>
>>> 73,
>>>
>>>       ... Joe, W4TV
>>>
>>>
>>> On 4/28/2011 11:29 PM, Kok Chen wrote:
>>>> On Apr 28, 2011, at 4:05 PM, Kok Chen wrote:
>>>>
>>>>>     (the dreaded Amtor shift).
>>>> Whoops, sorry to disparage Amtor. I just remember that Amtor shift
>>>> isalso 170 Hz. It is HF Packet that uses 200 Hz shift.
>>>>
>>>> 73
>>>> Chen, W7AY
>>>>
>>>>
>>>>
>>>>
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