Re: [Elecraft] Chinese Filters on eBay

Thanks, excellent work! 73 from David GM4JJJ > On 3 Nov 2016, at 16:08, Mark Goldberg wrote: > > Here is the link. Forgot to add it at the end. Posting on a small screen > will get you. > > https://sites.google.com/site/markstcxomeasurements/ > > 73, > > Mark >

Re: [Elecraft] Chinese Filters on eBay

Here is the link. Forgot to add it at the end. Posting on a small screen will get you. https://sites.google.com/site/markstcxomeasurements/ 73, Mark W7MLG On Nov 3, 2016 8:43 AM, "Mark Goldberg" wrote: > Since you brought this up, I will post a link to my analysis of

Re: [Elecraft] Chinese Filters on eBay

Since you brought this up, I will post a link to my analysis of the knockoff "TCXOs" for the Kenwoods. You do get what you pay for, and you can't even buy good parts for what they charge. The added phase noise of the Chinese parts increases the phase noise of the TX by about 10 dB 15 kHz away. It

Re: [Elecraft] Chinese Filters on eBay

It's not always a simple "pop". If equipped with a KRX3 sub receiver, it also involves disconnecting a bunch of cables and removing the KRX3 enclosure to see the main K3S filters, then opening the KRX3 enclosure itself to see what filters the sub rx has. 73, Ron AC7AC -Original Message-

Re: [Elecraft] Chinese Filters on eBay

nightmare. Can counterfeit versions be that far off? 73, Cliff K3LL/6 -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c Sent: Wednesday, November 02, 2016 8:36 PM To: Al Lorona Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Chinese Filte

Re: [Elecraft] Chinese Filters on eBay

"Pop the top"! Sent from my iPhone ...nr4c. bill > On Nov 2, 2016, at 5:39 PM, Al Lorona wrote: > > When purchasing a used K3, remember to ask, "Are the filters genuine > Elecraft?" > > Al W6LX > __ >

Re: [Elecraft] Chinese Filters on eBay

What are you trying to accomplish by buying the new filter? If it is to help avoid rx overload from a kilowatt next door, you might need one. Otherwise, the DSP filters can do the job just fine. The ONLY reason to have the crystal filters on receive is to strip any monster signals before they can

Re: [Elecraft] Chinese Filters on eBay

I bought a TCXO on ebay for my TS480 (SO-3). I installed it and then put the RF deck in the oven and then outside (it was winter). I went through the Alignment calibration to see how far it drifted. I can't remember the exact number, but it was within limits in terms of PPM. Which was great,

Re: [Elecraft] Chinese Filters on eBay

From my short experience with LiIon batteries from China ["Blue Bombs"], I'd save up my bucks and get the real Elecraft filters. 73, Fred K6DGW - Sparks NV DM09dn - Northern California Contest Club - CU in the Cal QSO Party 7-8 Oct 2017 - www.cqp.org On 11/2/2016 9:44 AM, AL7CR wrote: I am

Re: [Elecraft] Chinese Filters on eBay

One of the fun things I got to help with at a summer job was an acceptance test of a filter for aircraft use. We bolted that poor little filter to a huge shake table, then checked the group delay under vibration. It did not pass. There were some serious vacuum tubes powering the shake table

Re: [Elecraft] Chinese Filters on eBay

Hi all, so again: 1. I never bought these filters from China on eBay! 2. I just found them on eBay and I was disgusted a few weeks ago so I posted the warning message to others over here on the list in order to not waste their money as I am pretty sure these filters are poor quality! 3. As I

Re: [Elecraft] Chinese Filters on eBay

When purchasing a used K3, remember to ask, "Are the filters genuine Elecraft?" Al W6LX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] Chinese Filters on eBay

How's the performance? Anyone try one? Brian KB1VBF Sent from my iPad > On Nov 2, 2016, at 4:24 PM, Phil Wheeler wrote: > > > Yes, from Oct 18; perhaps this is it: > > - > > Hi, > > beware of purchasing the IF Crystal filters on eBay... > >

Re: [Elecraft] Chinese Filters on eBay

Yes, from Oct 18; perhaps this is it: - Hi, beware of purchasing the IF Crystal filters on eBay... http://www.ebay.com/itm/500Hz-CW-Crystal-Filter-for-Elecraft-K3-with-8-crystals-/172338045381?hash=item282025e1c5:g:u4MAAOSwGtRX1PVT

Re: [Elecraft] Chinese Filters on eBay

Someone on the list here posted a few weeks ago advising not to bother. It seems he did buy one and was not pleased with the product at all. On Wed, Nov 2, 2016 at 11:44 AM, AL7CR wrote: > I am tempted to try one of the Chinese made filters listed for sale on > Ebay.

Re: [Elecraft] Chinese Filters on eBay

Two old sayings come to mind 'A fool and his money are soon parted" and "Ya gets what ya pays for" 73 K0PP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm

Re: [Elecraft] Chinese Filters on eBay

Ya, I would not want to invest that much money in an Elecraft and take a gunshot approach with accessories. I pay for what I get. And… I have some exceptional Elecraft equipment on the desk, in the shack, in the go-bag and one currently at Don’s place. I always take the approach to buy what

Re: [Elecraft] Chinese Filters on eBay

FYI: You can't screen crystals just with a VNA. And it isn't just about Q. Crystals have physical IMD properties that are highly dependent on signal injection level. We have to screen the crystals over a range of signal levels individually, first, then again when they're assembled into a

Re: [Elecraft] Chinese Filters on eBay

Hi Petr, We go to great lengths to ensure performance of our K3/K3S crystal filters. First we 100% screen the crystals, testing them individually for electrical and physical IMD, activity level, Q, and center frequency. We then burn in, test and screen the finished filters. Finally, we label

Re: [Elecraft] Chinese Filters on eBay

If are willing to invest $50, then go ahead. He does have a return policy. Next, I would buy, beg, borrow a VNA and sweep them. That is the only way to be sure. It is hard to read his scans/sweeps. They Q factor looks a little soft, but usable. If the soldering is poor, that is an easy fix.

Re: [Elecraft] Chinese Filters on eBay

Hi, http://elecraft.365791.n2.nabble.com/IF-Crystal-filters-on-eBay-td7623489.html

[Elecraft] Chinese Filters on eBay

I am tempted to try one of the Chinese made filters listed for sale on Ebay. Does anyone have any experience with using one? I am considering the 1.8khz. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft