HW-9 question and wants..

[mike bryce]

brian.....

here's another tip

sometimes the finals self oscillate on 10 meters.

to find out, first dial up the transmit frequency on a second receiver. With
the hw-9 into a dummy load, key it. If you can hear yourself, then the HFO
and VFO and mixer stages are in fact working.

Now, remove the bottom cover and key the rig once again. Quickly get your
WCFT on the final's heat sink. If they are hot i.e. take the first layer of
skin off your WCFT, then the finals are oscillating. Only one final may be
hot, the other ice cold.


 btw.. WCFT= Well calibrated Finger Tip


Mike Bryce
SunLight Energy Systems
"Electricity at the speed of light"

----------
>From: Brian <bberkes at SNIP.NET>
>To: HEATH at LISTSERV.TEMPE.GOV
>Subject: Re: HW-9 question and wants..
>Date: Fri, Dec 24, 1999, 11:26 AM
>

>Info like this is fantastic... and the list is great! Thanks Bill!
>
>----- Original Message -----
>From: "William Mabry" <n4qa at HOTMAIL.COM>
>To: <HEATH at LISTSERV.TEMPE.GOV>
>Sent: Friday, December 24, 1999 12:56 AM
>Subject: Re: HW-9 question and wants..
>
>
>> ----- Original Message -----
>> From: Ron Emerson Kb9E <Rpemers at AOL.COM>
>> To: <HEATH at LISTSERV.TEMPE.GOV>
>> Sent: Thursday, December 23, 1999 10:22 AM
>> Subject: HW-9 question and wants..
>>
>>
>> > Hello all,
>> >
>> > I just aquired a nice HW-9, HM-9 and HFT-9.  Initial tests show the HW-9
>> > receives and transmits on all bands except 10 meters.  It does have the
>> > optional accessory pack installed with the WARC bands.  10 meters is
>just
>> > dead.  Any thoughts on why only 10 would go would be a big help before I
>> tear
>> > into it.
>> >
>> > Also,  I would like to add the PSA-9 power supply and SP-99 station
>> speaker
>> > to help complete my qrp station.  If anyone wants to part with either of
>> > these items let me know condition and price.
>> >
>> > Thanks and Merry Christmas to all and 73'
>> >
>> > Ron
>> > KB9E
>> >
>> > Sponsored by the City of Tempe
>> >
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>> Sounds like your problem lies on the oscillator board in the ten meter
>> section of the HFO.
>> Look for a bad xtal at Y108 ( 42.830 Mhz ) or improper tuning of L132,
>L116,
>> L117 or bad diodes or improper biasing of same at D136, D137, D116, D117.
>> Solder joints should be checked, too as well as SW1, section 8... the one
>> with the grey wire.
>> Transmit / Receive freq. formula:  HFO - VFO - BFO = transmit/ Receive
>freq.
>> Hint: BFO runs at IF freq., (  APPROXIMATELY 8831 kHz ).
>> 73 and good luck.
>> Bill N4QA
>>
>> Sponsored by the City of Tempe
>>
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>
>Sponsored by the City of Tempe
>
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