Roland,
unless someone upgraded the argosy II, they didn’t come from the factory with
17 and 24 meters. They did do 30 meters out of the box
Mike, WB8VGE
www.theheathkitshop.com
> On Oct 6, 2020, at 6:35 PM, Ken Brown <kenradiobrown@gmail.com> wrote:
>
> "I have also noticed that there is very little output on a number of
> bands,(10m, 17m, and a couple of others, possible fault on the filter?)."
>
> You mean TX RF output from the drivers? And the output from the finals is
> low on all bands?
>
> On Tue, Oct 6, 2020 at 10:24 AM ROLAND HOWELL via TenTec <
> tentec@contesting.com> wrote:
>
>>
>> Hi Ken
>>
>> As per Mikes advice i have checked the voltages to the final's ( 0.7v)
>> all ok, not certain of the function of Q5 and U1.
>>
>> Have replaced all of the driver's, final's and U1.
>>
>> Have checked the output on my scope, nice and healthy input and output
>> from the drivers, it gets lost from then on.
>>
>> I have also noticed that there is very little output on a number of
>> bands,(10m, 17m, and a couple of others, possible fault on the filter?).
>>
>> I purchased a scruffy but working radio to take voltage comparisons as i
>> have 6.1volts on the t/rx connector #8 on the rf mixer board whilst in
>> receive, disconnect the tx power to #8, rx audio comes up a few dBs,
>> Both Mike and i think that the radio has been zapped, yet the rx is
>> great.
>>
>> hope i haven't bored you
>>
>> 73
>>
>> Snowy
>>
>> ------ Original Message ------
>> From: "Ken Brown" <kenradiobrown@gmail.com>
>> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>> Sent: Tuesday, 6 Oct, 20 At 20:40
>> Subject: Re: [TenTec] Argosy 2
>> Since I don't have a schematic for that radio to look at I'm not sure
>> where
>> T3 is. Input to final transistors or output? Even so, direct comparison
>> on
>> a wattmeter may be misleading. The impedance is different in various
>> places
>> in the PA circuit, only the input and output to the whole PA board can
>> be
>> assumed to be 50 Ohms. How about measuring voltage at those various
>> points
>> using either a HF AC Voltmeter (the kind with the detector diode right
>> inside the probe) or an Oscilloscope with 10X probe?
>> DE N6KB
>> On Tue, Oct 6, 2020 at 9:21 AM ROLAND HOWELL via TenTec <
>> tentec@contesting.com> wrote:
>>
>> Hi All
>> Update on the above radio, i attached a co-ax pigtail to the collectors
>> of the drive trannies, got 1.5 - 2 watts out at that point, then fitted
>> the pig tail to the base's of the power trannies, got just milliwatts
>> out, so then attached the pig tail's to output leads of the T3, got just
>> 0.5watts out of that transformer.
>> So do those transformers go faulty?
>> Any/all advice appreciated
>> Thanks
>> Snowy G0HZE
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