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-   -   Shuguang 805 - Advice (http://www.diyaudio.com/forums/tubes-valves/179274-shuguang-805-advice.html)

FullRangeMan 16th December 2010 05:23 PM

Shuguang 805 - Advice
 
Hi,
Someone have the Shuguang 805 datasheet? Could post here or send me in a PM or post a Link?
I do not find it on Google.
Also I would like your opinion about the Shuguand 805 Top Plate Cap model, in regards sound quality and reliability etc...
The 805 also have the Shuguang 211/845 micro-crack on the plate, know as whisker-noise??
Thanks for your input,
Gustavo

djmiddelkoop 16th December 2010 08:30 PM

maybe this helps ( scroll to the bottom ) :

ming-da

FullRangeMan 17th December 2010 01:18 AM

Dear Djmiddelkoop,
Very thanks for this Lampizator link. Good info about the 805 sound.

Iam impressed with that Ming Da 805 amps Mr.Fikus tested, looks the greatest praise I read to date to a chinese amp.
Lampizator inform the price of 1490 US dollars(pair) for the Ming Da MC3008A monoblocks, I sorry to inform the manufacturer of this amp
(Meixing MingDa) already raise the price to 3.800 US dollars/pair, more than 100 percent increase. GULP !!:eek:

If anyone have the Shuguang 805 datasheet, please inform.
Thanks, Gustavo

FullRangeMan 22nd December 2010 10:56 PM

Just found the Shuguang 805 datasheet, no PDF file though, Iam post it here in plain text.
With this data on hand I wish ask to tubes experts, if this Shuguang 805 are a reliable and easy to drive tube.
Thanks for your input, Gustavo

Product appellation:FU-5/805
Product price: publicize in DIY
Product habitus: HOT SALE
times:310
date: 2005-3-30
Product depiction: 805(FU-5)

Straight heating thorium-tungsten cathode triode 805, can amplify the power of B series,
A-F and R-F, and can amplify the power of C series and R-F and high frequency surge.
805 is the same with GL-805, and can be exchanged each other.

filament heating
Uf …………………………10 V
If…………………………3.25 A

capacitance between poles
input capacitance……………………8.5 PF
output capacitance……………………10.5 PF
transroute capacitance……………………6.5 PF

limit rating
plate voltage……………………1500 V
plate dissipation power………………125 W
working frequency and plate voltage when working frequency is higher than 30MC, the output
power of plate voltage and anticathode will adjust low according to the below table:
frequency(MC)  plate voltage and anticathode input power
     B grade electrode C grade telanticathode modulate telex
 30     100%     100%
 45     90%      82%
 80     71%      55%
commend working state(reference value)
B series A-F power amplify(two tubes) limit value
Ua………………………1250 1500 1500 V
Ia(max.sig.per tube)……………210 mA
Pa(in)(max.sig.per tube) z……315 W
Pa (per tube) ………………………125 W
Ug……………………………………-16 V
όg(pk)…………………235 280 V
Ia(0)……………………148 84 mA
Ia(max.sig)……………500 600 mA
Pd…………………………6 7 W
RL(a-a)……………………6.7 8.2 kΩ
Pout(max.sig)…………300 370 W

B series R-F power amplify
(on carry wave condition, each tube's maximum modulate coefficient is 1.0)
limit value
Ua………………1250 1500 1500 V
Ug…………………………-10 V
Ia………………135 115 150 mA
Pa(in)……………………………………185 W
όg(pk)…………70 70 V
Ig………………15 15 mA
Pd………………11 7.5 W
Pout……………55 57.5 W

C series R-F power amplify and surge(anticathode modulate)
(on carry wave condition, each tube's maximum modulate coefficient is 1.0)
Limit values:
Ua………………1000 1250 1250 V
Ug………………-155 -160 -500 V
Ia………………160 160 175 mA
Ig………………60 60 70 mA
Pa(in)……………………………………220 W
Pa…………………………………………85 W
όg(pk)…………295 300 V
Pd………………16 16 W
Pout……………110 140 W

ja2dhc 23rd December 2010 09:29 AM

The below URL shows a phot of Shugang's 805A and 805(FU5).

http://ja1cty.servehttp.com/805/FU5vs805A.jpg

FullRangeMan 23rd December 2010 08:04 PM

This image are the new 805BSE used by MING-DA in his amps. I was told it is made by Shuguang by special order from MING-DA, on the other hand I read in a chinese online shop, the 805BSE maker are Star Electronics(SE), but I translated this Cantonese text on the Google.
Can someone confirm or deny these information above?
The others Ming-Da 211 and 845 amps also use this new bottle, the metal base and pins are gold plated.
http://img211.imageshack.us/img211/4435/805bse.jpg


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