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TOPIC: MB1 And 10Mhz external reference oscillator.

MB1 And 10Mhz external reference oscillator. 13 Mar 2022 03:22 #1

  • John-KC2QMA
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Is anyone using a 10Mhz external reference oscillator with the MB1?
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
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MB1 And 10Mhz external reference oscillator. 13 Mar 2022 09:42 #2

  • LA9AKA
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Yes, I use the unit with two outputs from Leo Bodnar. Works great.

www.leobodnar.com/shop/index.php?main_page=index&cPath=107

73
Hans Christian LA9AKA
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MB1 And 10Mhz external reference oscillator. 14 Mar 2022 06:18 #3

  • John-KC2QMA
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Thank you Hans for the info. The dual output is extra nice!
Any special settings to know about?
John
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
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MB1 And 10Mhz external reference oscillator. 14 Mar 2022 14:41 #4

  • LA9AKA
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The setup is very straightforward. You have to connect it to your PC and set up parameters first, after this it will run by itself. There is a very easy user manual on their webpage. Just remember to set External reference in ESDR2/ESDR3 and you are good to go!

The products and service from Leo Bodnar is top notch.

73
Hans Christian LA9AKA :D
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MB1 And 10Mhz external reference oscillator. 15 Mar 2022 09:17 #5

  • John-KC2QMA
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It says in the manual that the 10Mhz ref input on the MB1 is 500 ohms? It that correct or is it a typo?
Normally it's typically 50 ohms.


ref.png
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
Last Edit: 15 Mar 2022 09:20 by John-KC2QMA.
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MB1 And 10Mhz external reference oscillator. 15 Mar 2022 15:24 #6

  • LA9AKA
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Just a typo i guess! It works beautifully.

73
Hans Christian :D
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MB1 And 10Mhz external reference oscillator. 16 Mar 2022 20:43 #7

  • sm4ive
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Why do you need reference? the radio are so stabile so i dont see the use of a external reference.
That needs to be explained
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MB1 And 10Mhz external reference oscillator. 16 Mar 2022 21:15 #8

  • LA9AKA
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For me I just like to be bang on frequency when operating meteor scatter on 6 and 2m.

73
Hans Christian LA9AKA :D
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MB1 And 10Mhz external reference oscillator. 17 Mar 2022 07:03 #9

  • sm4ive
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Ok well thats really overkill :-) Been doing EME/ MS on all bands never used reference, even back in the early 70ths with Yaesu Ft221R Only time a reference are needed are if your transverters are unstable ,meaning feeding the LO in tranvsretrs with stable signal..The MB1 are so stable.
just my thoughts .-)
i have a dual port leobodnar but its only for feeding my LNB for Q100 sat
/lars SM4IVE
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MB1 And 10Mhz external reference oscillator. 03 Apr 2022 00:27 #10

  • John-KC2QMA
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What is the minimum and maximum power level you can inject into the 10Mhz ref input of the MB1.
The Leo Bodnar GPS has 4 output level options. It seems to work fine at 32mA but I don't want to use more drive than necessary.

Here is the GPS output specs:

3.3V cmos @ 50 ohm.

+13.3dBm, 32mA
+12.7dBm, 24mA
+11.4dBm, 16mA
+7.7dBm, 8mA
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
Last Edit: 03 Apr 2022 00:28 by John-KC2QMA.
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MB1 And 10Mhz external reference oscillator. 03 Apr 2022 00:30 #11

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"Why do you need reference? the radio are so stabile so i dont see the use of a external reference.
That needs to be explained"

Because I can and want too. :)
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
Last Edit: 03 Apr 2022 00:31 by John-KC2QMA.
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MB1 And 10Mhz external reference oscillator. 03 Apr 2022 11:49 #12

  • LA9AKA
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John,

I don't remember, but I'm pretty sure I am using the highest power from the GPSDO.

73
Hans Christian LA9AKA :D
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MB1 And 10Mhz external reference oscillator. 03 Apr 2022 13:19 #13

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I currently have it set for 16mA and it locks just fine.
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
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