Monday, February 28, 2011

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x Icom R75 Group

I was asked to explain the solution I have chosen to power the receiver R75.
well, I thought: "... and now that the story ?..."
so I could start :....
the receiver in question is equipped with an internal linear regulator
which produces its output a constant voltage of 13.6 V with a maximum absorption of 1.1a.


Considering that in the temperature range of operation, the temperature can reach up to 45-50 ° C by
decrease the power dissipation of 1.3 W max (see performance chart below)


and recalling that the max current is 1.1A
we can extrapolate the maximum voltage that can fall across the series regulator.


Datasheet Cosultando the regulator (the PQ30RV31 SHARP) we see that the maximum dropout as a function of current and temperature is 0.15V which we approximate to 0.2 V.


Now we have all the data to decide which pre-stabilized voltage applied to the radio, without interfere with the functioning of the equipment.


This is the maximum voltage that can be applied.
While the minimum is given by


I chose to feed all at 13.8VDC .... Under the scheme regulator
ext.


E 'Remember that the LT1038 regulator needs a good dissipation.
I recommend using at least one heat sink like this.


I'm here for questions, requests or criticisms! Hello


Saturday, February 26, 2011

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radio listening on Blackberry Messenger

If you have a Blackberry with BIS running and how my passion for radio listening ...
I created a chat group on the Blackberry, one must have access to the QR code below with the BlackBerry Messenger application.

Thursday, February 24, 2011

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Meeting Joint Select Committee and Board of Directors of the Community Social Cremasca

On February 23 met the joint working group composed of directors of the Select Committee of the Assembly of Mayors and the Board of Directors of the Community Social Cremasca.
The topic on the agenda: OPERATIONAL PLAN 2011. E 'was considered the revised draft document (to download click HERE) .

The comparison has raised some questions:
  • is problematic evaluated the reduction in the rate of reimbursement to municipalities for the interventions of child protection (from 50% to 40%). We share the need to go deeper into the issue. It should be noted that this maneuver is based on the grounds to ensure a minimum funding for the system of public services for early childhood (nursery) that in the current proposal seen reduced by approximately 50% compared to 2010 the budget allocated;
  • is made the request that the Community Social Cremasca bring out the reasons leading to an increase in staff costs and overhead than the figure at the final press;
  • It highlights the need for a deeper respect for the strategies and can return the system related to the choice of managing the district's plan of economic action to protect children.
  • We share the deep regret over the failure of preventive interventions in nature such as ADM or promotional projects for the sector.
In conclusion, the working group is updated to 16 March 2011.

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Icom R75 Service Manual

Now that I can post from my Blackberry ... start now with the report on our Receiver Service Manual for the Icom R75.
I hope I have done what you like! See you soon.

www.kb2ljj.com/Manuals/39-icom/IC-R75% 20Service% 20Manual.pdf

The mail will reach anywhere with the BlackBerry ®

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[Test] Post via Blackberry [Test]

This post is only a test !
Testing posting via BlackBerry device


The mail will reach anywhere with the BlackBerry ®