New TRV project (29/144/439) using ready PLL module

Hi all.

I want to show the new TRV project for frequencies
1) 29-29.5MHz
2) 144-144.5Mz
3) 439.5-440MHz

TRV in one box has a receiving part (740MHz) and a transmitting part PA 2W out (2.4GH). It injects a stable 25Mz signal into the LNB and is powered by 12V.
2W is enough to have a strong signal on the Oscar-100

TRV has low prices of items:
Ready generator module 11.5 $:

https://aliexpress.com/item/4000068359970.html

Aluminium case 2.50 $:
https://aliexpress.com/item/4000067969131.html

VCTCXO generator 0.5ppm 1.00 $:

https://aliexpress.com/item/33013343039.html

PA transsistor (10psc-30$) 1psc 3.00 $:

https://aliexpress.com/item/32973216655.html

Power 12V (DC 2.5-0.7MM + 1A + EU + 12V) 2.50 $:

https://aliexpress.com/item/32857105606.html

PCB 11.5 $

Filter SF2126E (700-750MHz) and filter SF2124E (2.4GHz) look for:

www.mouser.com

73

Artur

Hi

1) Yes, the frequency ~ 740MHz is converted to: 10/2/0.7m. I'm using a one mixer ADE-25MH (5-2500MHz)

2) I use two solutions:
- Well-designed PCB (look screen)), polystyrene, and PCB cutting around the generator, 50R artificial load.
You can use VCTCXO with 0.1ppm but they cost a lot.
- VCOCXO can be used: I bought a small OCXO (25MHz/5V) on http://www.ebay.com for $ 9.90 and rebuilt it to VCOCXO (add one resistor).

73

Artur

Only simplex, just like communication on 80m, 40m .....
If you want duplex you need to help yourself with the Internet:
https://eshail.batc.org.uk/nb/

I recorded a movie how my TRV works !!!!

https://youtu.be/TXql9srj1gs

The video is still being recorded on the YouTube platform.
Time to finish is 30 minutes.
Please wait

cześć

Diagramy TRV

Tłumienie LO i drugi sygnał miksujący dla 29MHz

LO: -15dB (jeden filtr SF2124E) + -15dB (dwa filtry SF2124E) + -30dB (podwójnie zbalansowany mikser ADE-25MH) = -60dB

Mieszanie różnicowe: -43dB (jeden filtr SF2124E) + -43dB (dwa filtry SF2124E) + -7dB (podwójnie zrównoważony mikser ADE-25MH) = -93dB

Sumowanie miksowania: (sygnał 2,4 GHz): -2 dB (jeden filtr SF2124E) + -2 dB (dwa filtry SF2124E) + -7 dB (podwójnie zbalansowany mikser ADE-25 MH) = -11 dB

Hi

Thank you. I have already corrected.

Firmware (QO100-NB) for ATtiny13 (Arduino):

TRV2_10_2 for out 29-29.5MHz and 144-144.5MHz

TRV2_2_70 for out 144-144.5MHz and 439.500-440MHz

TRV2_10_70 for out 29-29.5MHz and 439.500-440MHz

73

Artur

Hi

Yes it's true.

For 29MHz it is capacitor the value 6.2pF.
For 144MHz it is 2.7pF value.

For 439 is 1.2pF value.

The fewer the better.
VOX operate on an operational amplifier.

73

Artur

Hi

50MHz firmware added for ATtiny13

TRV2_6_10 for out 50.5-51MHz and 29-29.5MHz

For people who have problems with ATtiny programming, I can suggest ATTiy already programmed for this TRV.

73

Artur

Hi

Yes, if you want to build TRV2 write to me.

My website is: www.sp3osj.pl

Hi

A few photographs of TRV2
The VCOCXO generator has its own additional housing
50R (6x300R) 6x2W resistors do not touch the PCB.

73

Artur

Hi

BOM (pdf) my TRV2

73

Artur

Hi

Transverter QO-100 work:

https://youtu.be/1CCs8Mc6Ix8