[TenTec] Argosy 2

[ROLAND HOWELL]

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 at gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec at 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 at 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
_______________________________________________
TenTec mailing list
TenTec at contesting.com
http://lists.contesting.com/mailman/listinfo/tentec 
<http://lists.contesting.com/mailman/listinfo/tentec>
_______________________________________________
TenTec mailing list
TenTec at contesting.com
http://lists.contesting.com/mailman/listinfo/tentec 
<http://lists.contesting.com/mailman/listinfo/tentec>