[hpsdr] Sensitivity of dual mercury system differs significantly

[georg Prinz]

Hi Robin,

thanks for your nice comment. Well, my panels are pretty easy to 
fabricate. I bought a powder coating gun and powder at eastwood company
(http://www.eastwood.com/paints/hotcoat-powder-coating/powder-coat-guns.html). 
further more a kitchen stove from the flee market.
With this equipment and high pressure air from my compressor powder 
coating is easier than air painting. To protect my garage, I made a
small cabinet with an exhauster, where the plates are placed for 
coating. Afterwords you put it into the oven for about 15 to 20 minutes 
at about
220 degrees centigrade, depending on the powder chosed. The surface of 
the coated piece is more robust than normal painting and it is faster done.
The engraving was done by a local professional engraver because I don´t 
have a graving machine, yet.

On the internet you will find a lot of descriptions, how to do powder 
coating.  I even powder coat my tools for various machines.
I preferred a gun with pressured air instead of an electrical one 
because, you are able to coat pieces with lot of edges, where
the electrical one doesn´t work.

73, Georg, DL2KP






Am 06.06.2014 11:46, schrieb Robin Davies:
> Hi Georg
>
> FB with your construction - lovely work! Unfortunately I can't answer your questions, but I wondered if you could help me with a simple question instead?Did you use a commercial service to craft the lovely blue front panels on your rack mounted enclosures? If so, would you mind sharing details of what service you used?
>
> 73
> Robin
> G7VKQ
>
> On 05-Jun-2014, at 5:55 PM, Georg Prinz wrote:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hello Michael,
>>
>> I load some pictures into www.qsl.net/dl2kp/.
>>
>> The transverter is in dir dual_tvr_2m. It is built with components
>> from Kuhne electronic. The splitter for the oscillator is home made.
>> The oscillator will be synchronized from Excalibur/rubidium osc.hpsdr.
>> At the backplane you see the RX/TX relais and another relais to
>> switch from one- to two-cable antenna system. On the left side there is
>> a driver PA with 100W and the Sequence-controller.On the right side
>> there is the switched power supply S-400 and the power distribution
>> panel. The two Transverter Modules MKU 144 G2 are beneath the Oscillator
>> and Splitter. As the system is under test, the cables are not sorted,
>> hi.
>>
>> My actual hpsdr system is in dir hpsdr_dual_rx_2014_06_05. I removed one
>> mercury, so it is now a dual system. On the left side the boxed munin PA
>> with two blowers. The relais beside munin is necessary to switch
>> Penelope output between Munin and Transverter. The relais is switched
>> manually at the back plane. On the right side the switched power supply
>> and the voltage regulators for atlas supply.
>>
>> 73, Georg, dl2kp
>>
>>
>>
>>
>>
>>
>> Am Donnerstag, den 05.06.2014, 14:09 +0000 schrieb Owen, Michael:
>>> Dear Georg,
>>>
>>> I am also working on a dual transverter system; mine is based on Angelia.  The transverter is not finished yet so I have nothing to offer.  Please continue to post your observations.
>>>
>>> 73,
>>> W9IP
>>>
>>>
>>> -----Original Message-----
>>> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of georg Prinz
>>> Sent: Thursday, June 05, 2014 10:03 AM
>>> To: hpsdr at lists.openhpsdr.org
>>> Subject: [hpsdr] Sensitivity of dual mercury system differs significantly
>>>
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> Hello,
>>>
>>> during my initial tests with my dual transverter system on 2m, I realized that my dual mercury system with Metis has unequal sensitivity.  The difference between mercury one and two is about 20dB (measured without Alex after running through the calibration routine). The attenuation for RX1 and RX2 is set to 0dB in PowerSDR  mRX PS v3.2.9(2/23/14). The two mercuries are set up as Joe(K5SO) proposed for a clock feed of two mercuries.
>>>
>>> Did anybody encounter something similar? What could be the reason?
>>>
>>> Furthermore, I have another testsystem with OZY and one Mercury on my workbench. This system shows a noisefloor at about less than -130dBm, visually. My above mentioned dual system has a noisefloor at about -110dBm on both receivers. I have no explanation why a dual system should be worse. Any idea?
>>>
>>> 73, Georg, DL2KP
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>> ---
>>> Diese E-Mail ist frei von Viren und Malware, denn der avast! Antivirus Schutz ist aktiv.
>>> http://www.avast.com
>>>
>>> _______________________________________________
>>> HPSDR Discussion List
>>> To post msg: hpsdr at openhpsdr.org
>>> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>>> HPSDR web page: http://openhpsdr.org
>>> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>>> This message is intended only for the addressee and may contain information that is company confidential or privileged. Any technical data in this message may be exported only in accordance with the U.S. International Traffic in Arms Regulations (22 CFR Parts 120-130) or the Export Administration Regulations (15 CFR Parts 730-774). Unauthorized use is strictly prohibited and may be unlawful. If you are not the intended recipient, or the person responsible for delivering to the intended recipient, you should not read, copy, disclose or otherwise use this message. If you have received this email in error, please delete it, and advise the sender immediately.
>>
>> _______________________________________________
>> HPSDR Discussion List
>> To post msg: hpsdr at openhpsdr.org
>> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>> HPSDR web page: http://openhpsdr.org
>> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>


-- 


Internet: in progress
**********************************************************************

IMPORTANTE/IMPORTANT                      CONFIDENCIAL/CONFIDENTIALITY

Este mensaje ha sido elaborado únicamente para uso de la persona
o entidad a la que es remitido, ya que puede contener información
personal, confidencial y de acuerdo a ley no puede ser difundido.
Si el lector de este mensaje no es el destinatario señalado, o la
persona responsable para entregar el mensaje a quien está dirigido,
advertimos que cualquier divulgación, retransmisión o copia de
esta comunicación esta estrictamente prohibida. Si usted ha recibido
esta comunicación por error, por favor sírvase informarlo de
inmediato al remitente por correo electrónico o teléfono y borrar
inmediatamente el mensaje original.
    

This e-mail may contain confidential and/or privileged
information. If you are not the intended recipient (or have
received this e-mail in error) please notify the sender
immediately and destroy this e-mail. Any unauthorized copying,
disclosure or distribution of the material in this e-mail is
strictly forbidden.

Diese E-Mail kann vertrauliche und/oder rechtlich geschuetzte
Informationen enthalten. Wenn Sie nicht der richtige Adressat
sind oder diese E-Mail irrtuemlich erhalten haben, informieren
Sie bitte sofort den Absender und vernichten Sie diese Mail.
Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser
Mail ist nicht gestattet.
**********************************************************************


---
Diese E-Mail ist frei von Viren und Malware, denn der avast! Antivirus Schutz ist aktiv.
http://www.avast.com


 1402051961.0