ARRL

M0ELS

Joined: Sat, Sep 21st 2013, 09:10 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
I2C data buswith flex transceivers Mar 31st, 20:54 2 345 on 7/4/16
series or other modulation types Nov 7th 2015, 21:16 3 1,287 on 26/11/15
handbook 1st edition Apr 29th 2015, 19:13 2 912 on 30/4/15
TWT psu wanted Jan 25th 2014, 16:38 1 1,052 on 25/1/14
flex1500 + VAC software Sep 26th 2013, 19:14 4 2,248 on 7/4/14

Latest Posts

Topic Author Posted On
I2C data buswith flex transceivers M0ELS on 31/3/16
Being a bit long in the tooth, I am trying to get my flex 3000 to talk to my MFJ998 atu via the I2C flex data bus. Is there anyone out there who has managed to get these two talking to each other.
I did get a breakout pcb for I2C to usb, but realize its all over my head. I am looking for a solution please.

Thanks
John
series or other modulation types M0ELS on 26/11/15
ok, so this is not good as I don't want to change those devices for one's with a higher drain voltage. Are there any resources where I can read up on this subject, related to mosfet devices. Looking through some books, its looks as if I will have to modulate the driver as well.

73
John
series or other modulation types M0ELS on 7/11/15
I have an old "chatterbox transceiver" solid state and am looking for advice on how to connect an AM modulator to the small amp pcb with 20w output. The am uses a pair of RD15HVF1 devices. I was think along the lines of using a small audio transformer with a centre tap secondary connected to the supply voltage and the other end "floating". The centre tap will connect to the modulator cao an electrolytic cap. The primary side connects to the mic and gnd. Has anyone got any tips or ideas on other types of ways of getting AM audio into these devices.

73
John
handbook 1st edition M0ELS on 29/4/15
Hallo all, I am not sure where to place this, but here goes. I have got what I believe is to be a signed person copy of the 1926 1st edition of the radio amateurs handbook softbound. Its has a signature of F.E Handy - personal copy inside the 1st page. Its in near mint condition and comes from an estate sale or sk sale.
I would like to find out if this is the genuine signature and a genuine copy of the handbook, which might be worth a lot of money to someone.

Can anyone help ?

73
John Randall - M0ELS
flex1500 + VAC software M0ELS on 7/4/14
Hi, Well I have tried endlessly to get it working with programs like cw skimmer, faros, fldigi and wspr/wsjt. Before I go further, let me say that I have a medical problem due to getting chickenpox aged 45 and struggle with rubbing two pennies together in sync...hi

I purchased a copy of VAC software and need someone to help me perhaps via skype to set this all up. Concentration is my worst enemy. If anyone can help my sky id is m0els-uk


73
John

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