Pluto Box Solution w full GPSDO Lock

My latest plug & play network radio. based on the ADALM-PLUTO

More pictures and the associated Pluto mods can be found at:

https://www.qrz.com/db/DK1ML

73, Mike

Quote from om0aao

Nice homebrew composition! Pity that AC plug does not fit in the back, position near LED is not the best.

Hi,

i have selected this position because it is the nearest point to the power supply (short ac cables).

The box is a black box, there is no front and no back

73, Mike

Quote from DL3DCW

Very nice project. Can you give us a short list of used components?

Yes sure, here is the bill of materials:

1 ADALM-PLUTO SDR

1 Leo Bodnar mini GPSDO

1 13cm Volks-PA (out of production)

1 2.4G ZigBee band pass

1 2W SMA-JK coaxial attenuator 6GHz 50ohm 20dB

1 Step-Up converter 28V / 150W from CN

1 Step-Down converter 12V / 5A from CN

1 Step-Down converter 5V / 5A from CN

1 Bias Tee for the LNB from OPA-Design

1 Network adapter Micro-USB (OTG) ICY BOX IB-AC510

1 ACS512 5A Hall Module

1 LM3914 Display Module

1 Semi rigid SMA cable

1 N to SMA connector

1 SMA T adapter female, female, male

1 SMA 90 degree female to male adapter

5 RG316-D SMA male to SMA male pigtail cable 6 inch

2 RG316-D SMA male to SMA female pigtail cable 4 inch w. mount

1 SMA female to F male adapter

1 SMA female to SMA female adapter w. mount

1 F female to F female adapter w. mount

1 Cinch connector + plug

1 LED 3mm w. mount

1 CAT5 short cable 4 inch

1 IEC 320-C6 AC connector

1 Anderson Power-Pole DC connector

1 Fan 40x40x10mm DC12V w temperature control circuit

1 Neutrik Ethernet connector

1 Aluminum enclosure

1 Power cord IEC 320-C5

1 BS170 FET

1 BAT41 diode

1 100n capacitor

1 470R resistor

1 opto coupler LTV 354T-SMD

1 micro usb power cable 6 inch

1 mini usb power cable 6 inch

1 Meanwell sps 12V / 2.1A (25W)

Some cables, bolts, screws and misc. parts

...

Small improvement: Now with PTT out for an external power amp.

And here is the (holiday-) power amp, thats fits "into" the new socket

Power out >40w p.e.p. (27w cw), 12-16v supply voltage with built in 30v/150w step up converter.

A 10db/5w attenuator has to be inserted to meet the 80mw specs of the input of the pa.

This is not a QRO setup, this higher power is only used to improve the transmit quality of the 40cm holiday dish to stay at beacon level.

Yes, it's the amp from PE1CMO but equipped with n-connector which raises the output power compared to the sma connector.

The portable station in action @Mykonos Island

Easy 5 min. set up.

46.6 deg. elevation for Greece.

The ash tray special mount

25 w for beacon level with the 40 cm dish.

Ready to go for a QSO.

73, Mike

PS. I use 3m Aircell-7 with N and SMA connector as the TX cable (loss 1.2 dB).

Hi Oliver,

the 25 mhz are connected with a sma t-connector to the pluto and the lnb at the default singnal level (32mA). More singal level at the Pluto reference input gives a better spurious emission supression.

To avoid reflections at the cable the lnb side should be terminated. I always use a combination of 10n, 150 ohm to ground and 10n to the xtal input of the lnb pll chip of the Octagon quad green lnb.

This should work with 50 ohm and 75 ohm cables for the 25 mhz reference signal,

For PTT generation i've used the old method where the data-0 line of the Pluto tx-chip goes via a small capacitor and a BAT41 schottky rectifier diode to the gate of a BS170 fet which is driving an optocoupler with his open drain.

Today i would prefer the DATV firmware solution and just one LTV-354T optocoupler between the GPO0 and GPO1 pins.

See: Pluto Mods: just 1 part PTT, DC-Mod, GPSDO Mod, Ethernet connect

73, Mike