Posts by oe7dbh

Bandpass filter between BU500 and Power Amplifier, for IF with:

23cm not necessary

70cm not necessary but recommended

2m recommended

50MHz recommended

More than 1.7 watt continuous wave at a maximum of 42 ° C heat sink temperature ----> without fan and over 2 hours long.

YES that is possible with improved cooling. Actually, with good antenna for QO-100 , no additional amplifier is necessary.

>1,7W in mode: SSB CW FM FMATV digital , 200~250mW in DVB mode

The new version with better cooling allows you to get the full power out of the BU500 ( >1,7W ) for a long time. At my test from cold start time to 2 hours later, the power has dropped from 2.05W to 1.96W ( just over 4%, with normal heat sink version power loss is >10% ) At room temperature 21.6°C was two hours later heatsink without extra fan 41°C warm

https://www.ebay.com/itm/BU-50…f078a8:g:MTwAAOSwOPldZMk9

Hi

Hides http://www.hides.com.tw offers on its ebay platform https://www.ebay.com/itm/2-4G-…416003:g:lIkAAOSwo0BdWsIL a small power amplifier that is suitable for portable operation or mounting directly to the antenna, especially for ADALM-Pluto or other 13cm transmitter with low output power.

I got two pieces to test, here's the pictures and result :

Both Amplifier sweeped.....

Maximal output power between 1,7W and 1,9W on 2400MHz & ~37dB Gain.

Vcc: 8 Volt.......16 Volt ( not so critical because a voltage controller is on pcb board )

Icc: ~800mA & full output power

Schematic diagram here: MMZ25333B-DB-01-V02_180226.pdf

Amplifier Chip data here: https://www.mouser.at/datasheet/2/302/MMZ25332B4-1517182.pdf

Monitor voltage you can get from here:

Example for ADALM-Pluto use....

BU500 wird heuer noch erhältlich auf dem Flohmarkt Eggenfelden ( erster Samstag in Oktober )

BU500 will be available this year at the flea market Eggenfelden (first Saturday in October)

Wer mit 2ppm LO stabilität ( -10....+60°C ) und output auf 70cm band zufrieden ist , findet SSB single LNB am HamRadio 2019 stand D039 in Halle3.

JA Flo , es ist möglich ( wie du in OE7 forum sehen kannst ...Beitrag 21.11.2017 )

aber das sollst du selber oder jemand andere mit guten SMD löt kentnisen machen.

Danach hast in SSB-CW mode über 1,5W output ....BU500 braucht aber auch zusätzlich ein kleines Lüfter.

13cm UP converter for all modes of operation, here are a few tests and pictures. Version v6 just in the market.....

New version of already known BU500 is ready for deliver at HiDes. calvin@hides.com.tw

....and so looks from already installed in housing with heat sink

What has been improved compared to the last Version ?

1. Schönere HF Spectrum - bessere LO Freq. Unterdrückung Nicer HF Spectrum - better LO Freq. suppression
2. Höhere Ausgangsleistung , bis 2W in SSB mode Higher output power, up to 2W in SSB mode
3. Höhere IF Input Leistung 100mW higher IF Input power 100mW now
4. Externe 10MHz Clock Input
5. Verpolungsschutz Reverse polarity protection
6. Betriebsspannung wurde erhöht, Schaltnetzteil ausgetauscht Operating voltage has been increased, Switching power supply replaced

1W - Output spectrum with 70cm IF input Signal and LO freq. 1968,0 MHz( with 70cm and 23cm IF no necessary Bandpass Filter between UPconverter and PA )  

LO signal on the output port... with 2m 70cm and 23cm IF input signal

More output power....

Higher attenuation value built-in to allow higher IF input power...

Input port for extern 10MHz Clock signal...        ....and how can I switch from internal TCXO to external 10MHz clock signal ?

Data....

Input: 100MHz......1350MHz version 100mW for SSB and -15dBm for ATV

Output: 2365MHz.....2500MHz SSB up to 2W DATV 200mW

Local Oscilator: free programable in 1kHz step 1050MHz....2600MHz TK2ppm ( -20°..... +70°C )

Vcc: 9V....16V max. 1Amper

Tested by OE7DBH

Available on the fair Ham Radio 2019 in Friedrichshafen-Germany , hall 3 table D039

Incredible, you still have lemon on the tree, with me 1m snow and temperature -15 ° C at 07:00 clock.

I can also confirm...

RX Antenna equipment:

Dish offset 1m

Twin Octagon OTLSO LNB with LO on 10.057291GHz for SSB and 9.50GHz for ATV

Vy 73 de Darko OE7DBH

Update for BU500 version1 and version2

Software ( for change default Local Oscilator frequency ) you can download here: https://www.dropbox.com/sh/nve…8flQFzrFhkcX703rwx5a?dl=0

....and for power problem, please use this hardware configuration:

I will use this UPconverter for NB transponder and WB transponder ....

Input range: 100MHz .... 1300MHz
Version1..... -15dBm
Version2.... +10dBm

Output range: 2365 ..... 2500MHz , >200mW output analog and digital

Technical report.... https://www.oe7forum.at/viewto…f=7&t=284&start=180#p2321

Hi Guys , here is Darko OE7DBH from cold Tirol, today....

I'm not running the beacon. I have parked my both antenna at 26 ° and wait until the right HamRadio beacon come...

Currently received spectrum looks like this.....

I use Octagon LNB with LOfrequency at 10.057291 GHz.

Later, i want to receive signals with FT790R.

LNB IF according to that looks currently still so clean.

Good DX wishes you OE7DBH

.....translated with Google !