None Electrolytic Splitting Of H2o

[Duncan]

Duncan, you are doing a great job but you can look for 135mhz and 810mhz this will be a lot easier as they are standards and should be cheaper.

Mike

Aircraft emergency frequency - Wikipedia, the free encyclopedia

[Michael John Nunnerley]

Duncan, you are doing a great job but you can look for 135mhz and 810mhz this will be a lot easier as they are standards and should be cheaper.

Mike

[nvisser]

BGY33 pdf, BGY33 description, BGY33 datasheets, BGY33 view ::: ALLDATASHEET :::
From Ebay
Philips BGY36 VHF Power amplifier Module 148-174MHZ - eBay (item 220667004095 end time Oct-09-10 10:44:04 PDT) More than 10 available
The output can be adjusted between about 10 and 30W by adjusting the input voltage or by varying the input signal strength
A 50-60mW input will give a 10W output at 156Mhz using the BGY36
So a pre-amp will be needed.

[Duncan]

[nvisser]

There was only one in stock when I watched last night. So unless they can get more, we better keep on searching.

[Michael John Nunnerley]

Odyssey Electronics | Electronic Components Supplier [ S-AS3-513-2 to S.32189.1 ] Page 21 data http://www.google.co.uk/url?sa=t&sou...hcW4o-NvR2o0AQ

If we can't find one closer, this will do with a pre-amp for the input, I have a design for that.

Mike

[Duncan]

Odyssey Electronics | Electronic Components Supplier [ S-AS3-513-2 to S.32189.1 ] Page 21 data http://www.google.co.uk/url?sa=t&sou...hcW4o-NvR2o0AQ

[nvisser]

I love it when a plan comes together.

[Michael John Nunnerley]

Don't make things complicated

All you need is the Motorola 85Y12 for the UHF amp, 19euros and four external components.

I am looking for a VHF version 100-200mhz also 10watts

Mike

[Duncan]

Schematic and building suggestions TR1001 868.35 MHz Hybrid Transceiver. relating to Motorola amp for your consideration http://www.rfbayinc.com/SCH/AMP5151SCH.pdf http://www.rfbayinc.com/SCH/AMP5151ASY.pdf As you note Mike things HF associated are flying.http://www.sphere.bc.ca/test/rf-semi...le-shw5151.pdf

[nvisser]

RF Transistors and Integrated Circuits RFIC, MMIC

A UHF amp does not come simpler than this, complete with circuit diagram and cheap, Motorola 10w 700-900mhz LDMOS power amp, motorola 85Y12.

Mike

Indeed! No pre-amps needed?
That will mean we have to choose the frequency a bit higher.
It needs 5mW input . Will the 4 mW output from the VCO be enough?
I hope there is a similar amp for the vhf frequency.

[Aaron]

edit

Here is a dBm-volts-watts conversion table:
Conversion Table/Decibels-Volts-Watts
They're all over google in pdf or whatever.

ZX95-625A+ +6.2 dBM power output = 0.4mW @ 0.445 v (at 6.0 dBM)

ZX95-200-S+ +10 dBM power output = 10mW @ 0.71v

This patent won't do anyone any good but I'm just posting it because
it is the patent for these vco enclosures listed on the data sheet:
Mechanical case for housing ... - Google Patent Search

These modules have vcc, gnd and vtune.

Is there wiring diagram to power them? It isn't on the data sheet.

Does power like 6v battery simply get hooked to vcc and gnd and the
positive from the battery go through a variable pot to vtune or is it not
as simple as that?

edit: I meant 4mW

[nvisser]

These modules have vcc, gnd and vtune.

Is there wiring diagram to power them? It isn't on the data sheet.

Does power like 6v battery simply get hooked to vcc and gnd and the
positive from the battery go through a variable pot to vtune or is it not
as simple as that?

See Duncan's post 130 for a circuit diagram

[Michael John Nunnerley]

UHF power amp

RF Transistors and Integrated Circuits RFIC, MMIC

A UHF amp does not come simpler than this, complete with circuit diagram and cheap, Motorola 10w 700-900mhz LDMOS power amp, motorola 85Y12.

Mike

[Michael John Nunnerley]

Here is a dBm-volts-watts conversion table:
Conversion Table/Decibels-Volts-Watts
They're all over google in pdf or whatever.

ZX95-625A+ +6.2 dBM power output = 0.4mW @ 0.445 v (at 6.0 dBM)

ZX95-200-S+ +10 dBM power output = 10mW @ 0.71v

This patent won't do anyone any good but I'm just posting it because
it is the patent for these vco enclosures listed on the data sheet:
Mechanical case for housing ... - Google Patent Search

These modules have vcc, gnd and vtune.

Is there wiring diagram to power them? It isn't on the data sheet.

Does power like 6v battery simply get hooked to vcc and gnd and the
positive from the battery go through a variable pot to vtune or is it not
as simple as that?

The data sheat shows that the output is 4mW and 10mW accordingly. You have a 50 ohm coax connection and a power connection for your say 12v, you then have a V/tune "positive" grd is common. Depending the voltage applied to the V/tune will give you the frequency, it is linear, more voltage the higher the frequency.

Normally this would be connected to a variable voltage tuning circuit with digital readout as found on transmitters, this we do not need as we can find the frequency we want by changing the voltage and then fix it.

I have been looking at the outputs and possible single stage amps and transistors suitable for the frequency we require. (seems a lot of people all of a sudden are buying these VHF and UHF output transistors from price dropped sites) not normal I think!
RF Transistors and Integrated Circuits RFIC, MMIC

Mike