[TenTec] Corsair II U10 Problems

Wed Jun 1 17:37:58 PDT 2011

Jerry:

You're right.  I hadn't bothered to do the math.  I don't have 
experience with the AADE displays, but they look like quality products. 
I'm tempted to try one with my Century 22 or with my Heath HW-100.  I 
have an SB-650 display for the HW-100, but every time I use it, I have 
to open it and reseat or swap chips to make it work properly!

                                     73,

                                     Bob WB2VUF

On 5/30/2011 10:00 AM, Jerry Haigwood wrote:
> Bob,
>       The AADE display will not work without modifications.  The problem
> comes the way Ten Tec did the HFO/PTO mixing scheme.  On some bands the 9MHz
> IF frequency is subtracted from the HFO/PTO mix to get the correct frequency
> display.  On other bands, 9MHz is added to the HFO/PTO mix to get the
> correct frequency display.  Also, you need to know which sideband you are on
> to correct for the 3KHz difference in the sideband frequencies.  All this
> logic is accomplished by the display logic board and the U10 chip.  However,
> AADE is the company I have been working with to develop the new display.
> Neil has a prototype and I will try it out this week.  I'll let everyone
> know how well it works.
> Jerry W5JH
>
> -----Original Message-----
> From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
> On Behalf Of Bwana Bob
> Sent: Monday, May 30, 2011 8:50 AM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Corsair II U10 Problems
>
> How about one of the AADE (Almost All Digital Electronics) display kits?
>
> http://aade.com/dfd2.htm
>
>                           73,
>
>                           Bob WB2VUF
>
>
> On 5/28/2011 6:37 PM, Barry N1EU wrote:
>> Jerry, manual is available at http://tentec.com/files/Corsair%20Manual.pdf
>>
>> Understood about wanting to stick with the PTO for the cleanest
>> possible signal.  If you find a replacement for the display, please
>> post the info to the list.
>>
>> One thing that appeals to me about the PTO option is getting a
>> smoother, weightier tuning action with variable tuning rate.  I wish I
>> could install my hefty Omni 6 tuning knob on my Corsair, but the shaft
>> diameters are different.
>>
>> 73/GL, Barry N1EU
>>
>>
>>
>> On Sat, May 28, 2011 at 10:17 PM, Jerry Haigwood<jerry at w5jh.net>   wrote:
>>> Barry,
>>>       The reason I purchased the Corsair was to get rid of a DDS.  I would
> not want to ruin a perfectly good receiver by adding more digital
> noise/spurs to it.  I have other rigs which have a DDS in them if I want to
> listen to the noise.  :-) I am currently looking at a replacement for the
> Corsair II display.  It may also fit the Corsair I.  However, I don't have
> enough info on how the Corsair I works.  Anyone have a manual I could look
> at?
>>> Jerry W5JH
>>>
>>> -----Original Message-----
>>> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com] On Behalf Of Barry N1EU
>>> Sent: Saturday, May 28, 2011 1:11 PM
>>> To: Discussion of Ten-Tec Equipment
>>> Subject: Re: [TenTec] Corsair II U10 Problems
>>>
>>> No, I wouldn't assume your 68705 is going to fail anytime soon.  If it
>>> did, you could either:
>>>
>>> 1. purchase a parts rig to have spare boards on hand OR
>>> 2. replace the PTO with DDS VFO which could drive a freq. display
> directly
>>> 73/GL,
>>> Barry N1EU
>>>
>>> On Sat, May 28, 2011 at 5:43 PM, Jerry Haigwood<jerry at w5jh.net>   wrote:
>>>> All,
>>>>
>>>>       I am new to the list and also new to the Corsair II I recently
>>>> purchased.  I have seen some U10 problems recently.  If U10 truly fails,
>>>> what are the options for repair?  I have been told Ten Tec no longer has
> any
>>>> U10 (68705) ICs.  Anybody know if that is true?  I recently purchased a
> 288
>>>> filter and 263G VFO from a ham who had U10 fail.  He decided to part out
> the
>>>> radio rather than repair it.  I also see a corsair on QTH.Com which has
> U10
>>>> problems.  Is the U10 problem something I should "look forward to?"
>>>>
>>>> Jerry W5JH
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>>
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