[renaudrenaud]

After 3 years without any turntable, I decided to buy a new one. Spend some time listening vinyls, now I am thinking about more regression... I've seen the FU19 is here for less than 100$. And I was thinking about some tubes... Ok, let's wait the end of the Chinese new year holidays and I will order one sample. My fear is starting to accumulate again a lot of tubes amps...

[renaudrenaud]

Well...

[FullRangeMan]

Congratulations for your new amp,
really hi value per dolar.

[Jon L]

Well...

You have the original Lii (not Song) driver!  I'd be interested in how the FU19/FM30/829B gets along with them.

BTW, I received the GU29 tubes from Russia, and it looks extremely similar to FM30 tubes (left in photo), like the same tube.  The sound, not so much..

0212252006_1739591243838 by drjlo2, on Flickr

[FullRangeMan]

Do you bough the GU29 at GSTubes ?

[SET Man]

Well...


...

Hey!

   Well... congratulation on your new amp!
 
   Man! This thread keeps popping up and every time I see it I have to talk myself out of buying one

   What are the speaker I see in the pic are you using?

[Jon L]

Do you bough the GU29 at GSTubes ?

Bought from Russian seller who had stock in U.S. 

Also bought some neodymium bullet tweeters on a tip and whim, and boy, who would have thought single-ended tube (829B) could have such enormous amount of top treble resolution and air 

0215251752_HDR by drjlo2, on Flickr

[FullRangeMan]

Also bought some neodymium bullet tweeters on a tip and whim, and boy, who would have thought single-ended tube (829B) could have such enormous amount of top treble resolution and air 

Seems your ears are good. Amps with simple circuits as Single Ended Triode have more musical presence and are more faithful to the music, especially in harmonics.

The highest note on a good violin is 2100Hz and the piano is 4186H, above this there is only harmonics that tweeters try reproduce.

[FullRangeMan]

[renaudrenaud]

You have the original Lii (not Song) driver!  I'd be interested in how the FU19/FM30/829B gets along with them.

I am really really happy with the FU19 and the speakers. I don't listen very loud, the power is sufficient for my taste and currently I am too tired to measure the sound pressure in my listening point to give objective information.

I don't regret at all the 120€ spent on this little amp tube toy, no hum, no buzz, enough details and dynamic.

I have few remarks: the front plate is not exactly aligned, the volume button is touching it: I can fic it. On the back side, the 2 ground on the same column are a bit dangerous: I am waiting right connectors on the right and left ones on the left. I can also fix it.

Also, the headphones output is not working for me: there is certainly a problem of impedance matching and my headphones are producing only highs.

In general I really love cheap audio: there is no correlation between price and quality and I don't need social representation via my audio equipment: I just need some tools to play music, this is the main point, and I like to experiment because I am a bit curious.

[renaudrenaud]

Mmmm...

[mick wolfe]

Just joined the "club" myself. This with the FU29 10 watter. Poor man's 300B We shall see, but sounds pretty impressive for what's literally chump change in today's market. As always...YMMV, but more importantly, don't shoot the messenger.

[renaudrenaud]

Just joined the "club" myself. This with the FU29 10 watter. Poor man's 300B We shall see, but sounds pretty impressive for what's literally chump change in today's market. As always...YMMV, but more importantly, don't shoot the messenger.

Well well well. We want pics my friend!

[mick wolfe]

The attempt to post a photo here will not accept an HEIF file. Don't have to patience to convert files at this point. Sorry. I can send you a pic via e-mail if you pm your e-mail address. Aside form that, just google FU29 A300 amplifier eBay.  (10 watt per channel version)

[FullRangeMan]

Dont need convert from Heif.
Just copy/paste and save as PNG or Jpg.

[renaudrenaud]

Probably this one?

[mick wolfe]

  spot on....the 10 wpc version. Bought from an eBay seller.

[renaudrenaud]

Some translation from the company Who sells it on Taobao: The Russian name of FU29 is FY29, and the American name is 829B. It is a composite tube that encapsulates two beam-emitting tetrodes in the same glass shell. Using it in a power amplifier with parallel single-ended Class A output is to use a unit with the same parameters in a tube in parallel. The FU29 filament voltage is 6.3 V, the current is 2.25A, the screen voltage is 600V, the screen grid voltage is 200V, the zero-signal screen current is 40mA, and the full-signal current is 110mA. The grid bias voltage is -18V, and the optimal load impedance from the screen to the screen grid is 137500. When it is paralleled and single-ended, the output power (effective value) reaches 10W. The circuit of this machine is simple, and a composite tube 6N3 is used as the preamplifier. In this way, a single channel can complete the power amplifier task with a 6N3 and a FU29, and has a single-ended pure Class A power output of more than 10W. The actual thrust and listening experience are better than 300B. This machine is small in size, unique in shape, but strong in thrust. Don't use the power of general transistors or digital amplifiers to compare the actual thrust of this tube amplifier, because the high power supply voltage and unique output transformer structure make the output internal resistance change relatively small for high and low frequency signals, have good low frequency driving ability, and the sound is soft, smooth, warm and delicate. This is also the reason why tube amplifiers have not been completely replaced after the emergence of many new technologies.

The production dates of this batch of domestic tubes we have received range from the 1960s to the 1980s. The meticulous workmanship is amazing. It is hard to imagine that we could complete such a sophisticated and complex product in that era, and the consistency is very good. In the specific test, we compared it with the EL34 and 300B, which are more recognized in the market. We think the sound of FU29 is remarkable and is not inferior to these internationally renowned tubes. Our domestic products have also had good products to be proud of. From the FU32 tube amplifier we made earlier, we have achieved good sales in both the domestic and international markets, and the return and repair rate is basically zero. It can be seen that in any era, as long as it is a good and excellent product, it will be recognized by the market and users. We will continue to work hard!

Originally, we thought that there should be a relatively large stock of such tubes in the domestic market, but when we made the FU32 amplifier, we found that it was not what we imagined. As the number of tubes available on the market decreased, merchants continued to increase prices, and we were forced to adjust the sales price many times. The same is true for the FU29 tubes used in this machine. When we started searching, we found that many sellers were selling them, and each had a lot of inventory. When we actually bought it, we found that only a few of them really had goods, so the number of tubes we actually got was not large, and there would not be too many machines that could be made. Players who like it can start early, and this may become extinct one day.

This machine is suitable for driving general bookshelf speakers and some floor-standing speakers with relatively high sensitivity. This adds a new Bluetooth 5.0 receiving module to facilitate wireless connection of mobile phones and other portable devices. No

The schematic diagram of this machine is as follows:

[renaudrenaud]

And the schematic

[renaudrenaud]

On the local Chinese market the price is 120€. The same as the FU19, inoffensive, and I seen a lot of tubes around 10€.