[hpsdr] Penelope output power uncontrolled

[George Byrkit]

Tokio,
Yes, the Penelope (but NOT PennyLane) suffered from a build problem where the transformer T2 was reversed.

Perhaps, having not changed the designated configuration in PowerSDR, you likely inherited the previous gain settings (per band as PA settings) that you had used to compensate for the previously reversed transformer.  And these caused higher output than you expected.  You had only reported the 80m and 40m outputs previously (as 'power over 600mw'), and not reported the other bands, such as 6m.

It is good that you now have the increased power output on 6m that you were seeking.

73,
George K9TRV

-----Original Message-----
From: Hpsdr <hpsdr-bounces at lists.openhpsdr.org> On Behalf Of Tokio Endo
Sent: Thursday, August 8, 2019 6:59 AM
To: Hpsdr Mailing List <hpsdr at lists.openhpsdr.org>
Subject: Re: [hpsdr] Penelope output power uncontrolled

***** High Performance Software Defined Radio Discussion List *****

Hello All,

The problem has been cleared. However the reason is obscure.

What I did this afternoon is the following;

1) I installed an old version of PowerSDR 2.2.6. Then I tested the Penelope. The output power si quite normal. On 80 meters and 40 meters the power is around 496mw. 
2) The above mean there is no H/W problem on the Penelope.
3) I use again PowerSDR 3.4.9 with the Penelope. The power is over 600mW, so the problem continues.
4) With the conviction that the malfunction is due to PowerSDR, I opened the set-up panel, then I reset PA settings. The figures on each band are not so changed.
5) After the above the problem has been cleared.

This is a very strange behavior of PowerSDR. Before T2 orientation change, PowerSDR worked fine with the Penelope. After T2 orientation changed, the same PowerSDR v3.4.9 put the power over 600 mW.

Anyway now I can use the Penelope with 3dB up of the power on 6 meters.

Regards,

Tokio
ja1cca

> 2019/08/07 22:17、Tokio Endo <endotokio at gmail.com>のメール:
> 
> Hello,
> 
> Today I changed the orientation of Transformer T2, the outout transformer of Penelope, like Pennylane. This is a well known fix for T2 reversal reported years ago.
> 
> After this change, the output power of Penelop on, e.g., 40 meters band jumped over 600mW on the forward power of PowerSDR V.3.4.9. The power seems to be uncontrollable, but this is not identified by a power meter, but only on the screen of PowerSDR.
> 
> The firmware version of Penelope is 1.8, and before doing this T2 orientation change, thais only yesterday, my Penelope worked fine except 6 meters band’s low power, only 100mW.
> 
> I’m afraid this problem might be caused my soldering work on Penelope which damages some parts.
> 
> Any comments would be very much appreciated.
> 
> 73,
> Tokio
> ja1cca

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