HL2 Problems - Help pse

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Pencoys

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Nov 29, 2021, 5:27:59 AM11/29/21
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Recently I experienced an early morning power outage. At the time the HL2 was
operational and might have been transmitting WSPR using SparkSDR when the
power failed.
Now, I am unable to transmit WSPR but I am able to receive and decode it..
When I go to transmit WSPR the signal is just a nasty collection of clicks
when monitored on a receiver, however, a clean carrier is obtained when
transmitting all other carrier modes AFICS, certainly AM and FM carriers are
clean but I am unable to test SSB
I have reinstalled the SparkSDR software on the computer that was controlling
the HL2, I have tried re-installing the Gateware (hl2b5up_main) using SparkSDR
but programming failed. I have tried rebooting the HL2 to the factory
gateware using the Key/PTT short, but it appears not to be resetting
correctly.

I am out of ideas, Do I have a hardware problem or am I missing an obvious
clue...
thankyou, Mike M3MSM

Alan Hopper

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Nov 29, 2021, 5:33:33 AM11/29/21
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Hi Mike,
is that using the wspr mode in spark or using wsjtx and digiu?
73 Alan M0NNB

Pencoys

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Nov 29, 2021, 6:47:54 AM11/29/21
to 'Alan Hopper' via Hermes-Lite
Gm Alan, its using the SparkSDR built-in wspr generator. I hav'nt been able to
get the wsjt-x audio in/out because the HL2 is being driven by a remote
raspberry Pi in the garage, no audio is returned.
73 Mike

On 29 Nov 2021 at 2:33, 'Alan Hopper' via Hermes-Lite wrote:

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Alan Hopper

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Nov 29, 2021, 6:59:53 AM11/29/21
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Hi Mike,
well there is not much to go wrong with the built in mode, assuming the pa is on and the drive is set.  Network issues can cause tx problems, these are less likely to show up on just a carrier as these are unchanging iq signals sent, have you got relays clicking rapidly?
73 Alan M0NNB

Pencoys

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Nov 29, 2021, 7:03:05 AM11/29/21
to 'Alan Hopper' via Hermes-Lite
I'm pretty sure its not a SparkSDR problem, Alan, I have tried with Raspberry
Pi and PC versions with the same result. Receive is working perfectly.

On 29 Nov 2021 at 3:59, 'Alan Hopper' via Hermes-Lite wrote:

Date sent: Mon, 29 Nov 2021 03:59:53 -0800 (PST)
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Alan Hopper

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Nov 29, 2021, 7:24:40 AM11/29/21
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Hi Mike,
you could try sig mode with two tones if you can't get audio to it, setting the lna gain during tx should allow you to see the tx signal, if this looks different to what you see on another receiver it might indicate a pa issue. It might be worth double checking the filter settings.
If you can move it to your pc and test with audio and other software it would eliminate any spark oddities.
73 Alan M0NNB

Pencoys

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Nov 29, 2021, 1:23:42 PM11/29/21
to 'Alan Hopper' via Hermes-Lite
Alan, I have tried with the 'SIG' SparkSDR mode, on 20m with drive level of 1
and a carrier at 14.100 and tone 2 at 500hz, I zero beat on the first tone
then increase the level of tone two, it sounds terrible. very weak tone and
'ragged' a but like a scratchy fm. PA current is around 300mA but fluctuating
between 290 and 310mA.
any help ?

On 29 Nov 2021 at 4:24, 'Alan Hopper' via Hermes-Lite wrote:

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Pencoys

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Nov 29, 2021, 2:14:09 PM11/29/21
to 'Alan Hopper' via Hermes-Lite
further to my last, with the PA disabled the signal still sounds terrible. I
have been unable to get Thetis to initiate transmit and SDRConsole just
confuses me with all the windows, dropdowns etc. managed to get the HL2 into
tx but could'nt find how to return to receive.

On 29 Nov 2021 at 4:24, 'Alan Hopper' via Hermes-Lite wrote:

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Steve Haynal

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Nov 29, 2021, 2:26:45 PM11/29/21
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Hi Mike,

Can you please report what the signal is like with SparkSDR and a straight key plugged directly into the HL2, ground tip to shield to transmit CW? Is the signal clean? What power output are you seeing? What currents are reported? Is temperature increasing very rapidly? Are any components becoming very hot?

Also, why don't you think the factory reset is resetting correctly? Please try the above experiment with normal and factory reset boot.

Finally, can you try updating your gateware with Quisk or hermeslite.py?

73,

Steve
kf7o

Pencoys

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Nov 29, 2021, 5:21:58 PM11/29/21
to 'Alan Hopper' via Hermes-Lite
Alan, enclosed a WAV file of audio recording taken with IC-7300.
first is SIG mode with tone2 = 1000hz, followed with FM and AM blankcarriers
finally CW (terrible as it was keying with two wires..) hope this helps.. I
can record more if required.
thanks for your help, 73 Mike

On 29 Nov 2021 at 4:24, 'Alan Hopper' via Hermes-Lite wrote:

Date sent: Mon, 29 Nov 2021 04:24:40 -0800 (PST)
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20211129_230914.wav

Pencoys

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Nov 30, 2021, 4:53:04 AM11/30/21
to 'Alan Hopper' via Hermes-Lite
I have no idea what has happened, but all of a sudden the problem has
dissapeared and everything appears functional again. I'm a pessimist so I'm
sure it will return oneday without discovering the source of the problem.
I did try disabling the PA and the fault was still evident, so its would
appear not to be PA instability.
thankyou Alan for your time and effort on my behalf.
One other query, The SparkSDR PA Filter options, which one should be selected
for the Makerfabs N2ADR board, I currently have the n2adr-lpf selected.
73 Mike


On 29 Nov 2021 at 3:59, 'Alan Hopper' via Hermes-Lite wrote:

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Alan Hopper

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Nov 30, 2021, 6:41:55 AM11/30/21
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Hi Mike,
glad it is working, might be explained by some sort of network problem.
Any of the n2adr filters will be fine, the lpf and hpf in the name determine what filters will be used during rx. Using filters during rx can help if you have very strong stations near you, using no rx filters might gain a small advantage due to 'incidental dither' under some conditions.  The same filters are used during tx for all 3 options.
73 Alan M0NNB

Pencoys

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Nov 30, 2021, 9:48:28 AM11/30/21
to 'Alan Hopper' via Hermes-Lite
Thankyou Alan, I intended to go for a paddle on an SDR beach and find I need
a lifesaver swimming certificate.. Steep hill learning curve?, NO, a damn
overhang with no ropes...
get there eventually, stay safe, 73 Mike

On 30 Nov 2021 at 3:41, 'Alan Hopper' via Hermes-Lite wrote:

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