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Re: File upload: Rotable FLAG-antenna
I would be very interested but I can't find the file.
By Mike Usher · #21019 ·
File upload: Rotable FLAG-antenna
Hi group! If you're interested, I just uploaded the file "The Growing FLAG", which is a building instruction for my Rotable FLAG-antenna, which is somewhat smaller than traditional FLAG-antennas. I
By Hans Ostnell · #21018 ·
Re: LZ1AQ possible changes
Mike, It is easy to increase the current, which would improve the IMD, but it will increase the noise. Everett Sent from the all new AOL app for iOS
By Everett N4CY · #21017 ·
Re: LZ1AQ possible changes
I have built essentially the same circuit as Everett's and see essentially the same performance. I also wonder how that can be improved. Maybe show some measurements of the current and improved
By Mike M · #21016 ·
Re: Entry Level SDR recommendations
Thanks Bob. -- Doug Doug Forbes Page <http://sites.google.com/site/dougforbes1/home>
By Doug Forbes - WA6VYN · #21015 ·
Re: LZ1AQ possible changes
The present commercial LZ1AQ product claims to be "an enhanced and improved version with different active elements (low noise VHF transistors)." The present version of the AAA-1C
File /BD3OLH.rar uploaded #file-notice
The following items have been added to the Files area of the [email protected] group. * /BD3OLH.rar ( /g/loopantennas/files/BD3OLH.rar ) *By:* 钱志豪
By Group Notification <noreply@...> · #21013 ·
Re: LZ1AQ possible changes
In the older original LZ1AQ AAA-1B that i own, the transformer is on a 10 mm diameter blue coated Siemens/TDK Sifferit N30 toroid core, ?i =
Re: LZ1AQ possible changes
Hi Nils,
By Everett N4CY · #21011 ·
Re: LZ1AQ possible changes
I think he ist referring to the original schematic on the LZ1AQ website. The transformer there ist trifilar with 18uH each (5 trifilar turns on a toroidal core, u=1000, 10x6x4 mm). He probably
By Nils · #21010 ·
Re: Entry Level SDR recommendations
I've been using SDR receivers since the first softrock kits and have several along with classic receivers from AOR,JRC,Drake etc. Here's a couple of my observations. Firstly the available software for
By Chris Dee · #21009 ·
Re: Entry Level SDR recommendations
Doug, New F/W on the site page near the bottom: https://airspy.com/airspy-hf-discovery/ 73 Bob
By Bob W8RMV · #21007 ·
Re: Entry Level SDR recommendations
@JohnT... Could I suggest visiting groups.io "mwcircle" where there are many like-minded DXers? There you could find out what a difference SDR makes in the MW context and get more targeted advice on a
By Paul White · #21006 ·
Re: LZ1AQ possible changes
Reverse biased diodes in breakdown like Avalanche and Zener-diodes generate noise, a normal diode does it nor or much less. Diode based transistor biasing is frequently used and proven in audio
By Fred M · #21005 ·
Re: LZ1AQ possible changes
I suspect that ArnoR has not yet tested an original LZ1AQ amplifier and he did not evaluate it's performance on the bench nor in the field. Some of his judgement seems to be based on simulations and
Re: LZ1AQ possible changes
I would disagree with calling either this circuit or the LZ1AQ circuit differential. Both are two separate amplifier chains fed with a differential signal. The only differential coupling in the
By John Kolb · #21003 ·
Re: Entry Level SDR recommendations
Hello Mike You can PM me here tracey.gardner@... 73s Tracey
By Tracey Gardner G5VU · #21002 ·
Re: Entry Level SDR recommendations
Tracey, I didn't see a way to PM you. -- =================================================================== Mike M
By Mike M · #21001 ·
Re: Entry Level SDR recommendations
Do you have a link to the F/W update you mention. I don't see it on the Airspy site. Thanks Doug WA6VYN -- Doug Doug Forbes Page <http://sites.google.com/site/dougforbes1/home>
By Doug Forbes - WA6VYN · #21000 ·
Re: LZ1AQ possible changes
Should you not add my suggestion of a Full Wilson Current Source for each of R1 and R2 of present Everett Sharp circuit.? ( On the other hand, one could try the simple single BJT or FET constant
By Paul V Birke · #20999 ·