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Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Hi Steve, i think i remember the said circuit. It was together with a picture of the board layout. The bipolar transistors are not really in parallel. It's for the sake of the pcb-board layout CAD
By Fred M · #19868 ·
Re: Proper transient protection for Ethernet antenna feedlines.
Not the expert on the subject but - i would not worry about whether shielded Ethernet or not but hope it would be for what the application sounds like. The shield/screen is primarily for EMI
By kevin asato · #19867 ·
Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Hi Steve Do you have any information on what 1530L specifications was? It was supposed offer "improvements" however I cant recall what they were. I just ordered the 1530L on Andy's advice and then
By tardivat@... · #19866 ·
Re: Proper transient protection for Ethernet antenna feedlines.
From your writeup it is unclear how your shielded Ethernet cable runs: 1. Between two buildings 2. From floor to floor Please clarify without an emotional hit… NEC 2023 covers communications
By Raphael Wasserman · #19865 ·
Re: Proper transient protection for Ethernet antenna feedlines.
So maybe not the right answer but do what you want. If you are unlucky enough to have a lightning issue pull your cat 5 in and say “I don’t know how it get in here?” Bottom line I think
By Tom ANderson · #19864 ·
Re: Proper transient protection for Ethernet antenna feedlines.
The link that does not work is https://www.polyphaser.com/surge-protector-5-pair-100base-t-ethernet-ix-5h Fred - N4CLA [email protected]> wrote:
By Fred Moore · #19863 ·
Proper transient protection for Ethernet antenna feedlines.
I am not trying to start a flame war over "proper feedline entry to a residence." I live in the USA and have to comply with the NEC, National Electric Code. For coax it's pretty simple, ground the
By wn4isx <wn4isx@...> · #19862 ·
Re: Urban HF Antenna Dilemma: LZ1AQ vs. M0AYF
Latest experiment: Loop above the roof of my 2 story house. COMPLETE DISASTER !!!!!!!! no matter the loop orientation. S9+ noise. Only could hear some strong local stations. So far, the best
By Caaarlo · #19861 ·
Re: Wellbrook traced-out loop amp schematics uploaded to Photos
I have made an attempt to show the T1 windings with phase and labeled leads on the binocular core in a drawing I placed in the same folder in Photos that has the schematic. Hopefully this will help
By Steve Ratzlaff · #19860 ·
Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Hi Mike, I don't recall anything about what was posted last year about this design. But looking at it I would have to give it a big Fail (there's a better American term for this that would also
By Steve Ratzlaff · #19859 ·
Re: Wellbrook traced-out loop amp schematics uploaded to Photos
My schematic shows phasing dots on T1 secondary, which should be all you need to duplicate winding it. Using binoc cores makes it easy to keep track of the winding phase. You could put a piece of tape
By Steve Ratzlaff · #19858 ·
Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Hi I have saved this 1530LN leaflet already back in 2015... 73s The ALA1530LN is a compact Active Magnetic loop antenna primarily designed to provide improved performance over conventional passive
By rezeiwer · #19857 ·
Re: Wellbrook traced-out loop amp schematics uploaded to Photos
Hello. Is there an uploaded drawing of the winding method showing phase and turns direction and labeled leads?
By mhime6@... · #19856 ·
Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
This was not an updated LN version--the LN uses jfets. This goes back to the old ALA1530 designation, and only uses paralleled bipolar transistors--no jfets--and more inductance in the transformers to
By Steve Ratzlaff · #19855 ·
Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Data was posted here last year for what may have been the updated design. I made a schematic from it. Note that I have not built it. Interesting that it calls out J310s and has paralleled the 2N4401s
By Mike M · #19854 ·
Re: comparing Wellbrook earlier ALA1530 to later ALA1530LN
Wellbrook had an updated model of the ALA1530 LN with 32dB gain as well in the last years of trading. For some reason, the 'LN' suffix has been omitted from these models. I compared the last two
By Jeroen K7JBT · #19853 ·
Re: Wellbrook schematics update in Photos
Steve, ?You could have used mine. On the input there are two 82pF caps, with one end of each going. If you use it the way it is drawn in the schematic it will oscillate.?Everett
By Everett N4CY · #19852 ·
Wellbrook schematics update in Photos
John Hudak showed me a nice schematic he'd made of mine which I've put in my Wellbrook file in Photos, replacing my hand-drawn one. Thanks,
By Steve Ratzlaff · #19851 ·
Re: Urban HF Antenna Dilemma: LZ1AQ vs. M0AYF
My garden is outside. Is yours indoor ?
By Caaarlo · #19850 ·
Re: Urban HF Antenna Dilemma: LZ1AQ vs. M0AYF
If the noise floor is so bad and running antenna in house then a mla will look good..and maybe the reason so many people think they are good?? Caarlo why why were you using inside???? Thats mad!
By Simon · #19849 ·