I ordered this item from this same eBay Chinese seller and received it about a week ago, and also told Andrew Ikin of Wellbrook about it. After testing it and opening it up and looking at things, in fact it has nothing at all to do with a genuine Wellbrook loop antenna except the writing on the enclosure, and the advertisement copy. The loop amp itself is a clone of the popular LZ1AQ loop amp, but the transistors used in this one are very noisy. The frequency response, swept using my DG8SAQ VNWA, was poor, with low gain compared to a real LZ1AQ loop amp using good transistors such as 2SC5551A. The loop amp does not begin to meet the advertised specs. I left negative feedback on the sale; the seller contacted me afterwards and wanted details. I gave details including a sweep of the loop amp frequency response which I know the seller had no technical expertise to understand, but I was hoping they would pass the info on to whoever actually builds the product.
73,
Steve AA7U
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On 8/31/2022 11:22 AM, Roger Need via groups.io wrote:
Just saw this posted in another group.? Expensive junk?
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I wonder if Steve R will do a teardown of this one...
Roger
