[OZAPRS] 30m worked so now Rx on 40m 7.036.50

[David and Justine Olsen]

Re-reading the software docs, perhaps I should have chosen AKM to  
avoid this

Warning: The PK232 tones (2110/2310) land right on the upper edge of  
the passband of the typical SSB filter and they very likely will  
experience differential phase shift and unequal amplitude output;  
i.e. severe distortion. In fact, the tones may not make it through  
the passband of many HF transceivers with sharp cutoff SSB filters.  
(For example, many "contest grade" SSB filters have a cutoff at 2100  
or 2200 Hz.) On the other hand, the KAM 1600/1800 Hz tones land in  
the flat part of the pass band of any SSB rig and will be unaffected  
by the filter. Note on many HF rigs the passband tuning provided on  
RECEIVE allows you to shift the pass band to a higher band of audio  
frequencies, but it has no effect on the TRANSMIT side, so your  
transmitted tones will still be affected by the filter and may be  
distorted or may not even be transmitted.


David


On 28 Mar 2009, at 12:43, David and Justine Olsen wrote:

> With the new software I am set up as PK232. I have the dial at  
> 7.036.50. I am new to this, so if I am wrong, please point me in  
> the right direction.
>
> David
> VK4MDX
>
>
>
>
> On 28 Mar 2009, at 12:15, Scott Evans wrote:
>
>>
>> You haven't mentioned what tones your sound-card has been set too ???
>> 1600/1800Hz or 2110/2310Hz
>>
>> I've now QSY'ed from 20m back to 40m (dial=7036.510/2110/2310Hz)
>>
>> On Sat, 2009-03-28 at 11:58 +1100, ozaprs-request at aprs.net.au wrote:
>>
>>> [OZAPRS] 30m worked so now Rx on 40m 7.036.50
>>
>>
>> Scott Evans VK7HSE
>> Phone: +61362291658
>> Mobile: +61417586157
>> Skype: vk7hse
>> scott at vk7hse.hobby-site.org
>> http://www.vk7hse.hobby-site.org
>> PGP/GPG Key ID 74639624
>>
>>
>>
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