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silvercore - Page 7

post #91 of 161
Quote:
Originally Posted by silvercore View Post
just a statement nothing else.
@ immtbiker: throw me out if that is not fitting

Tangerine never got any financial advantage.
No Christof, this is fine.
Just as long as you don't talk specifics about your specific products, or put down anything made by competitive amp builders, as a member you are welcome to join in on any conversation.
Clarifying remarks made that might be damaging to you is quite fair, as long as a manufacturer speaks the truth.

We have had such a rash of shilling going on and members joining just to push a product that they were offered incentives on so they would do so, that we are quite tender to anything that looks vaguely suspicious.

Maybe it is language (ESL) barriers, but in this situation, Tangerine came onboard, saying this was the "end all" amp with no downsides and wasn't answering any direct questions that were being asked to him, that would have cleared any doubts of improprieties. It looked mighty suspicious.

And then you came on, unaware of the needs of the forum, which further fortified the beliefs that this was a setup.

We would love to hear about any of your designs future and present. Please look into taking out a Mall-Fi or Sponsored ad (relatively cheap) and you can say anything that you want and promote your products as they might deserve to be promoted. It might prove financially beneficial to your future business ventures.

Welcome aboard and good luck with any of your ventures.
post #92 of 161
Quote:
Originally Posted by DefectiveAudioComponent View Post
I don't understand why Christof was not allowed to post in this thread, to explain his design, considering that the Benchmark people were allowed to post in their thread. What's the rule?
Can you please provide me a link to the thread in question?

Thanks.
post #93 of 161
Here is an example where a trade-in is offered by Benchmark:
http://www.head-fi.org/forums/5623072-post2494.html

Then the Benchmark employee goes on a bit further down, explaining how their alps volume pot is real good.
http://www.head-fi.org/forums/5623284-post2497.html

Why is that OK when Christofs posts are not allowed? Where did Christof cross the line?
post #94 of 161
I have excerpted, in relevant part, the Head-Fi Terms of Use with respect to Members of the Trade (see here for complete TOU: http://hfimage.head-fi.org/documents/rules.html):

Quote:
Originally Posted by TOU Excerpts
"Member of the Trade" includes (but is not limited to) manufacturers; individuals selling items he or she made for more than the cost of parts and/or actual shipping charges; individuals selling items acquired for the primary purpose of resale; individuals performing services (like modifications or any other service) for which the price charged is more than the cost of parts and/or actual shipping charges; dealers; distributors; manufacturer's representatives; importers; magazine and e-zine writers.

"Main Forums" are those forums within Head-Fi not specifically designated as areas for commercial advertising by Members of the Trade.

No Members of the Trade can use his/her business name, postal address, e-mail address, telephone number or URL as part of his/her moniker. All Members of the Trade must contact the forum administrator at jude@head-fi.org to notify him of an interest in posting before making any posts. If a forum member who was not previously a Member of the Trade becomes a Member of the Trade, he must notify the forum administrator of the change in status. After notification of the "Member of the Trade" status, the forum administrator will then add the appropriate tag (Audio Dealer, Manufacturer, Distributor, etc.) to the appropriate profile(s).

A Member of the Trade may not--via the forums, Private Messaging, or Head-Fi's e-mail relay function--volunteer any information about a specific product that he is selling or making, in response to a general request for information about a type of product or in any other discussion in the Main Forums.

A Member of the Trade may not post announcements, advertisements, sales information or the like about a product he makes or sells in the Main Forums, via Private Messaging, or via Head-Fi's e-mail relay function.

No advertising by Members of the Trade that is not pre-approved by the Head-Fi administrators is allowed in the member forums. Some sponsors have Branded Sponsor Forums in which they will be allowed to advertise their wares. There will also be designated areas and forums where sponsors and non-sponsors alike will be able to advertise their wares. Head-Fi is most definately NOT anti-trade. In fact, trade members are a welcome and vital part of the Head-Fi community. However, Head-Fi's Main Forums, its Private Messaging System, or its e-mail relay function are not to be used for unsolicited self promotion and advertising of audio products or services.

Shilling, which is posting about products one is affiliated with under the guise/profile of a non-affiliated person, is extremely frowned upon by the moderators and admins of Head-Fi, and may result in a permanent ban from Head-Fi.

A Member of the Trade may not post negative comments about products/services of competitors.

A Member of the Trade may not review (or make any subjective assessments of) his or her services and/or products he or she manufacturers, represents, sells.

Head-Fi Private Messaging is not to be used for unsolicited advertising. Using Head-Fi Private Messaging for unsolicited advertising will result in at least a temporary ban of the sender from Head-Fi.

Head-Fi's e-mail relay function is not to be used for unsolicited advertising. Using Head-Fi's e-mail relay feature for unsolicited advertising will result in at least a temporary ban of the sender from Head-Fi.

Use only one username. Multiple profiles for the same individual are not allowed.
christof's posts, though perhaps not egregious, certainly ran afoul of one or more of the above-listed rules. I can't speak for the mods as to why other purported MOTs may or may not be allowed to post.
post #95 of 161
I think the ESL points are valid. The site's growing popularity means more international-fi participants, which is a good thing. And the TOU probably needs updating with the increasing market for all things headphone. Perhaps a new version should be drafted and translated into several languages.
post #96 of 161
W/r/t the amp itself, 4200 Euro is a LOT of scratch. The 812 tube looks interesting though.
post #97 of 161
silvercore / Christof,

Many thanks for the information about your tube choice. I will investigate the 812a further.
post #98 of 161
Quote:
Originally Posted by The Monkey View Post
This stuff isn't difficult.
I'm glad you understand it. In this preamp and also the SET amp with almost the same typology, I don't understand how either/both can do without an input/driver? Is the input/driver stage accomplished by a transformer so that both the preamp and the amp are transformer coupled on both ends? If so, how does this accomplish the necessary changes in impedance between inputs and outputs. The schematics are available on his site for the SET amp under DIY projects, but it still didn't help me understand.
post #99 of 161
I have no knowledge about the above, nor have I professed any. My response to you was in the context of shilling (about which you asked a question). To amplify my answer, the rules with respect to both MOTs and shills are pretty clear. Add some common sense and you should be just fine.

With respect to your technical questions, I encourage you to make use of any one of the many email programs out there to contact silvercore.
post #100 of 161
Quote:
Originally Posted by Frihed89 View Post
... In this preamp and also the SET amp with almost the same typology, I don't understand how either/both can do without an input/driver? Is the input/driver stage accomplished by a transformer so that both the preamp and the amp are transformer coupled on both ends? If so, how does this accomplish the necessary changes in impedance between inputs and outputs. The schematics are available on his site for the SET amp under DIY projects, but it still didn't help me understand.

With reference to the schematics posted in the Silvercore DIY section: The amp is transformer coupled at the input and output and uses a single stage triode amplifier. The input transformer (a transformer volume control) appears to be a 1:2 step-up device at it's max volume setting, and the gain of the tube is x29, hence the overall gain is 2 x 29 = 58. This is then stepped-down in the output transformer which allows for impedance matching to the load.
post #101 of 161
Thread Starter 
...i was so enthusiasted about this amp the whole week that i didnt give clear answers to all question on this thread, i apologize it especially Leny and Monkey.My English is not on the level as it should be i am from northern Europe.This amp was a special order to Silvercore .There has been rumours for years that there is a much better tube than 300 B or 2A3.I decided to surf the net to discover if there are interesting headphone amps on the market.After searching i found a webside where in Holland some triodeguys meet every year ,its the triodefestival/Holland.This guys have a scientific -philosofically approach to develop interesting amplifier circuits.There was on the show some Siberglut DIY headphone amplifiers with Eimac 100 TH tubes on it.100 TH tube was close to what i was looking for.I took the phone to Silvercore and spoke to Christof the owner and developer witch is a nice guy ,he could convince me that 812A tube would do the same than Eimac 100 TH .The DIY amp 812 A was a model for building the coming amp. Sennheiser Orpheus wich i owned for years was awesome but didnt give me the AIR what i needed for headphone use.Another thing ,i was always disturbed about Orpheus because it was not a "clean" tube amp, it had a dac section onboard.I was looking for pureness. Now I have had the new Silvercore amp for a week and try to discover it.Earlier i said that i dont hear differences between tubes but now when i changed 5U4G to an old Mullard one there was differences but the magic was gone.Next i changed the Chinese 812A to Electonic Enterprises 812A the magic came back and the soundstage was now a little bit clearer so i prefer this combination.I dont know if somebody is ordering this amp ever but i personally fullfilled my dream and will enjoy it as long as possible.
post #102 of 161
^tangerine, your explanation is much-appreciated. And there's no need to apologize for anything. If I have been than welcoming, please understand that I just feel strongly about our community here. With that said, welcome to head-fi and sorry about your wallet. It is always good to have another high-end offering available to us, and I am glad to hear that your amp is providing such a good experience.

Now what did you do with your Orpheus?
post #103 of 161
Thread Starter 
i sold it to Germany .The guy was happy to get it, he had the largest collection
of headphones and amps i ever heard .I think there was a big smile on his face when he got the Orpheus the only hole in his collection.
post #104 of 161
Quote:
Originally Posted by Leny View Post
With reference to the schematics posted in the Silvercore DIY section: The amp is transformer coupled at the input and output and uses a single stage triode amplifier. The input transformer (a transformer volume control) appears to be a 1:2 step-up device at it's max volume setting, and the gain of the tube is x29, hence the overall gain is 2 x 29 = 58. This is then stepped-down in the output transformer which allows for impedance matching to the load.
Thanks Lenny. I wonder if the transformers are up to it? I guess that is their specialty. I don't know this tube. How many watts is it good for?
post #105 of 161
Quote:
Originally Posted by Frihed89 View Post
How many watts is it good for?

From a quick look at the 812a datasheet it appears that the THEORETICAL max safe dissipation is in the region of 45W in 'continuous commercial service' (presumably rated for a Class B modulator). However if applied in a single-ended audio circuit it would need to be operated at levels much, much lower.

Datasheet: http://www.mif.pg.gda.pl/homepages/f...049/8/812A.pdf
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