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Locked MLA-30 clones
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Hi All,
Today's amusing fact. The Chinese MLA-30 loop, that I reverse engineered some time ago, and then put my version of the circuit on my website, has been cloned by the Chinese :-) The original PCB had no component designators, but one of the clones I have seen photo's of has, and they are the same as I used in my circuit diagram. You couldn't make it up... Regards, Martin |
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hey Martin they know your GOOD best wishes from the Northern Colony Paul
On Monday, February 26, 2024 at 07:43:34 a.m. EST, Martin - Southwest UK via groups.io <martin_ehrenfried@...> wrote:
Hi All, Today's amusing fact. The Chinese MLA-30 loop, that I reverse engineered some time ago, and then put my version of the circuit on my website, has been cloned by the Chinese :-) The original PCB had no component designators, but one of the clones I have seen photo's of has, and they are the same as I used in my circuit diagram. You couldn't make it up... Regards, Martin |
开云体育Funny my unit works surprisingly well.As good as a 30 ft end feed. ? ? Tom Anderson SDR_Radio@...
On Feb 26, 2024, at 10:47?AM, Martin - Southwest UK via groups.io <martin_ehrenfried@...> wrote:
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On Tue, Feb 27, 2024 at 06:23 AM, Paul White wrote:
Am I the only one not to find that funny?Hi Paul, I don't know, it's a personal thing. I didn't think it was funny in the "Ha Ha" sense, just odd. It seemed ironic, to a certain degree, that they were cloning something that was probably already a clone of something else, or at least made to look like it. The Chinese disregard for IPR is problematic, and the number of fakes they produce is disturbing, so if they are intent on sabotaging their own market share, and ultimately their economy, so be it. Regards, Martin |
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On Tue, Feb 27, 2024 at 11:22 AM, Martin - Southwest UK wrote:
if they are intent on sabotaging their own market share, and ultimately their economyMartin, the really UNfunny fact is that we're sabotaging our own economy by gorging ourselves on "cheap and cheerful" alternatives. Sorry if that offends some sensibilities as too "political", but life IS political. And yes, I do sometimes buy elsewhere when the home market can't deliver. |
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Perchance AI will render home-production more efficient
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and more competitive... Michael 2E0IHW if they are intent on sabotaging their own market share, > and ultimately their economy |
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On Wed, Feb 28, 2024 at 11:53 AM, Michael.2E0IHW wrote:
Perchance AI will render home-production more efficientI doubt it. The problem is that home produced designs are good, but we no longer have the manufacturing infrastructure, or a low enough cost labour force to produce them. It's our own fault, and especially that of our governments, who have let this happen. Often in pursuit of better dividends for shareholders, rather than worrying about any long term consequences. The UK is particularly bad for this, as very little of our critical infrastructure and manufacturing industry is actually UK owned. It's especially problematic when you have career politicians who have absolutely no experience of the world outside their own 'bubble', and take the path of least resistance to remain in power, and very often line their own pockets in the process. Grrr.... Regards, Martin |
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On Feb 28, 2024, at 8:38?AM, Martin - Southwest UK via groups.io <martin_ehrenfried@...> wrote:
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开云体育Perchance AI will render our politicians more efficient and focus our governments to being more competitive with our homegrown infrastructure. A worldwide ban on outsourcing and imposing a hard line with Chinese theft of IPR. Tough sanctions need to be imposed by the rest of the world. And a ban on their crap being peddled by the likes of Amazon and eBay would be a good start. I mean, how many more loop amps does the world actually NEED! ? Tom G6PZZ, slowly dismounting his soapbox… ? ? From: [email protected] <[email protected]>
On Behalf Of Martin - Southwest UK via groups.io
Sent: Wednesday, February 28, 2024 2:39 PM To: [email protected] Subject: Re: [loopantennas] MLA-30 clones ? On Wed, Feb 28, 2024 at 11:53 AM, Michael.2E0IHW wrote:
I doubt it. |
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On Wed, Feb 28, 2024 at 05:49 PM, Tom Crosbie G6PZZ wrote:
A worldwide ban on outsourcing and imposing a hard line with Chinese theft of IPR.Hi Tom, That isn't going to happen, unless current major world events force the issue. It would take decades to recover the skills that have been outsourced, plus it would be difficult to maintain anything like existing standards of living during any transition. Remember what happened in the UK when we shifted from manufacturing to service industries. In later years, that changed again, and the only real earners these days, unfortunately seem to be the city boys and girls, and we know where a lot of that shady money comes from... The rest of the economy seems to just be reliant on re-circulating what cash we have, and folks buying stuff like unnecessary coffee and take out food. It would cost a LOT of money, and present severe challenges regarding social change and adaptation. Which I can't see being popular with elected politicians. It's much easier when you have a dictatorship, or similar... Enough said, I'll go and chop up my soapbox too. Regards, Martin |
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My sentiment entirely. Hence the tongue-in-cheek "perchance"...
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OT: Odysseus could have used a trusty Spitfire altimeter :-) Michael 2E0IHW On 28/02/2024 14:38, Martin - Southwest UK via groups.io wrote:
On Wed, Feb 28, 2024 at 11:53 AM, Michael.2E0IHW wrote: |
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I've been remotely helping an owner to fix one of the cloned MLA-30's.
It looks like they also copied a mistake I made, and have got the transistor marked Q1 connected the wrong way around on the circuit board. I can't update my original circuit, as my old website is now archived, so they (or one of the dissatisfied customers) will have to figure it out for themselves. Regards, Martin |
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Impressive reduction in noise. Do you have a schematic of the replacement bias tee you used? Best John On Mon, Sep 9, 2024 at 10:32?AM biastee via <biastee=[email protected]> wrote:
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There's a lot of unwanted noise around 60 & 120KHz emanating from the DC-DC switcher in the Biasing Tee.
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You can obtain a similar improvement by adding a 1000uF capacitor across C2 in the biasing tee circuit.
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See toward the bottom of this archived webpage.
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https://web.archive.org/web/20230722120107/https://www.g8jnj.net/activeantennas.htm
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Regards,
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Martin
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On Tue, Sep 10, 2024 at 10:26 AM, John K5MO wrote:
Impressive reduction in noise. Do you have a schematic of the replacement bias tee you used? |
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I guess you are replying to my deleted message on replacing the MLA-30 biastee with a passive one. I deleted the message because the images were missing when I viewed the message online after posting - however the text was intact. If you have received the message via email, can you tell me if the images were present?
I composed the message by dragging & dropping the images into the body. Perhaps I should have created a Photo folder of the images and then inserted the images by using the 'insert/edit link' function?
Back to your question. The replacement bias tee is detailed here:
https://sites.google.com/site/randomwok/Home/electronic-projects/test-equipment-accessories/a-cheap-biastee-for-active-loop-whip However, it is a garden variety biastee and does not contribute to the observed noise reduction.?
Chin-Leong Lim, 9W2LC
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