On sale the new transmitter 15W

[oazz]

transmitter 15W on the best QN8007 chip! In the transmitter there is RDS! https://www.ebay.com/itm/375549953044?_ ... R5SXg8PhZA

[shuffy]

£130? I'll take 2! No wait, I'll take 3! Nurse! Bring my pills!

[Wk-end]

Can't ON AIR
Without Antenna.
lol

[EFR]

Just for fun, I asked some spectrumanalyzer pictures, lets see does they deliver.

[shuffy]

I watched these videos featuring TX's using this QN8007 but I don't think either were the same box this guy's selling.

https://www.youtube.com/watch?v=BNlcbffGbzw
https://www.youtube.com/watch?v=UTmOfvHrRBg

Functionally, the device looks impressive. I could nitpick about various things but can't give it a complete slagging based on what I see in these videos. It looks a lot better that what I've seen of these "BH" ICs. There is some close-in crud but it's a long way down, the pilot and RDS levels look iffy in the first video, but it's all parameterised so I'm sure better can be achieved. Yes I noticed the couple of "extras" on the analyser trace but I didn't see anything similar in the 2nd video, which is much more detailed - so, ignoring these for now, they could be receiver artefacts or something.

I skimmed the datasheet and unfortunately the version I saw wasn't giving much away in terms of how the various components are generated. I've assumed it's analogue carrier generation and modulation with the stereo mux and RDS digitally generated, much like most discrete TX's. Given this, and with all the digital control, clocks, signal processing/synthesis and what-have-you all on the same die, with minimal external components, you're never going to have a perfect spectrum without crud. So, a vast improvement on the BH IC's and to be honest, I don't know how they've got it this good. But the datasheet itself says it's intended for low power applications like phones and stuff, and would I ever connect a device like this to an amplifier? No. Let's hope the 1KW rigs this supplier is selling are more "conventional"??

[oazz]

There is an answer === the Goods of the first-rate quality. Very much reasonably the assembled transmitter, in filling by good accustoming to drinking, the strong refrigerator of cooling. Spare parts original, target transistor of original ability (Japan 100 %). The chip of modulation costs to QN 8007 (as, the original). A sound which is the sharpest, very qualitative, level of a MP3 in the first-rate quality (joking aside). At this price it is not simply cheap, it is a gift! It will not be better the decision to find, cannot look for in general. Conclusion: I urgently recommend to purchase! If you think, what transmitter is better for buying, this, or for example: NIO-T15A, NIO-T15B, CZE-15A, CZE-15B, ST-15B and other not high-quality devices – unequivocally it is necessary to buy only this GD-2015 transmitter. And I know about what I write, because bought, assorted and checked them everything! Yes, the GD-2015 transmitter will be more expensive a little, but it surpasses completely and in everything the specified models of the budgetary transmitters are higher. GD-2015 – absolutely other level of a sound, capacities, qualities. The GD-2015 transmitter, the best acquisition for the low price. I am sure for 100 %, you will not find the decision more favourably. This transmitter actually is more expensive much more that price for which it sell.

[teckniqs]

"New Transmitter"
.....with Copyright 2009 specs

Planes Will Fall

[oazz]

2015=.jpg

GD-2015 characteristics quite good. GD-2015 of a harmonica of-65 dBc. Planes will not fall.

[shuffy]

GD-2015 of a harmonica of-65 dBc. Planes will not fall.

They would if they heard my harmonica playing...

[EFR]

oazz, you sell these?

[oazz]

oazz, you sell these?

To GD-2015 sale I have no relation. The Chinese sells. I am not Chinese.

[teckniqs]

Planes will not fall.

[pirateaddict]

To say oazz isn't selling these, he's really trying! Can you please keep the Chinese made crap in china, please?

[oazz]

To say oazz isn't selling these, he's really trying! Can you please keep the Chinese made crap in china, please?

If that nothing to tell on business better to keep silent.

[mikroman]

what can be seen in the first video, although it is not completely clear whether the audio is processed, it is unlikely that at 75KHz there will be the same volume perception compared to the combination of dsp and good old varicap.

[teckniqs]

what can be seen in the first video

I could only see one video on their eBay listing.

...And that Chinese remix of Humpty Dumpty is a proper banger!

[yellowbeard]

There are a few ways to think of a transmitter, it can be a toy, a tool or a weapon. That yoke looks good if you can believe the specs, it has all the options and it is in a nice box. It's very whizz bang though, are they good encoders and signal processors or are they buggy, dirty and inadequate? Caveat emptor. I personally don't like a transmitter that can be adjusted from the front panel - people will dick with it, and that yoke has a remote control and "bluethooth". Chinese manufacturers can be bodgers and they'd say anything for a sale. I worked for a bloke that was getting big screen TV's from a spurious Chinese manufacturer, when we needed support they had gone bust - we looked up the address on google earth and it had gone from a green field, massive factory and bulldozed flat in 18 months.

[shuffy]

I decided not to mention this earlier because I thought I was having too much of a dig but why the **** do I want an IR remote on my rig? Perhaps I can hide under the bed and switch it off remotely when Ofcock sledgehammer the door down.

[radionortheast]

I see their using a tiny sa, I do see a problem will have the scale reduced, you won’t know what its doing in the fm band, the bottom of the carrier will not be there, obvious the lack of harmonics, I do see this in videos alot its misleading, makes it seem like you’ve got a nice thin carrier, it doesn’t show the interference the chip is creating in the fm band. transmitters do have harmonics, the filtering reduces them

What i’m suggesting might not be the most scientific thing, if you have a tiny sa, you use it with the telescopic antenna, using it a few meters away, maybe under it, transmitting a few watts into your antenna, with it switched off you will see the peaks of other fm radio stations, turning it on they should be still there, you may see a reduction in signal strength of them which is fine if your too nearby. If you see something very wide covering over them at the bottom of the carrier, then you know you’ve got a problem.

[oazz]

I to myself ordered. Will arrive in about 10 days. Then I will write as works.