Audio research sp-10 hi-fi tube preamplifier
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Hi, First I would like to say that this preamp will surely sound really good since it already does even with the issue I'm having I built this preamp about 2 years ago since I wanted to familiarize myself with tubes. Had a couple hiccups and made everything work but a humming sound was there and I don't believe it was ground loop.
I couldn't figure it out so I let it sit there collecting dust for a long time I recently started to go back on that SP preamp when I had spare time at night. I've removed every AB resistors since they were old and non matching. Some of the values were really off I've installed PRP resistors all over.
The sound is better and the "shhhhhh" sound that was really heavy on one channel is gone. I still have some of it in equal strength on both channels but much lower. The noise floor is still not quite there. I was thinking it could be the tubes I used in the power supply so I'm ordering better ones. Don't know if this will help reduce the noise floor One thing that bothers me is a "hum" issue, maybe a ground loop but doubtful There are two 0.
Whenever I put my hand near them 2"- 3" it starts humming much louder, touch them and it is really loud I've tried different caps there Solen, Dayton, Obbliggato If I don't put my hand close to the caps, I do get a lower hum that goes almost away when I touch the signal input ground with my bare fingers while music is playing Go figure Now keep in mind that it is still on plywood for prototyping but I would appreciate your help on what to try next SP psu.
Find More Posts by pinnocchio. I assume you have the usual 'big audiophile' caps? These have a large surface area and so have a large capacitance to nearby sources of hum, including you. This problem of big caps picking up hum seems to be getting more common. People seem to think that bigger must be better.
Not always true. Big caps can mean hum, and problems wth subsonics getting through. Find More Posts by DF I will post pictures of the setup soon and hope this will help. I need to go to my friends at Simaudio for that and since they're extremely busy, I cannot make it that often By screening, you mean a grounded chassis?
What would you recommend? Don't know if they're good and which one to use as preamp to match with SS amplifiers and which tubes to use for impedance matching with the gears If you can direct me to an extremely good sounding preamp project, I can handle it. I don't mind using point-to-point either. DF96 I had some 0. I have even smaller ones to try so I'll do later on.
Guy's if you believe I'm wasting money injecting in that SP, let me know but also tell me what could be a very good alternative.
Of course I've put in lots of money already in that SP and would love to make it sing perfectly but if there's something better that I can reuse my 4x Mullard E88CC tubes it would be great. Don't want to waste the money. Thanks Do. Originally Posted by pinnocchio. Originally Posted by Praudio. Here's the pictures. You'll see the 2x 0. Wow, very nice and interesting project! I am planning to use the same boards for my next project. Have you made further progress Pinnoccio?
Are the boards okay? From your explanation, it seems that hum is radiating from pcb copper trace of input tube. You can eliminate this hum by cutting the pcb trace and run a shielded wire instead to the gain control.. Originally Posted by Kaplaars. BB code is On. Smilies are On. Forum Rules. All times are GMT. The time now is AM. Resources saved on this page: MySQL User Name. Stay logged in? Mark Forums Read. Please consider donating to help us continue to serve you.
Page 1 of 5. Last ». Thread Tools. View Public Profile. Send a private message to pinnocchio. Visit pinnocchio's homepage! Quote: I was thinking it could be the tubes I used in the power supply so I'm ordering better ones. DF96 R. Join Date: May Send a private message to DF Send a private message to Praudio. Find More Posts by Praudio. Send a private message to Kaplaars. Find More Posts by Kaplaars. Send a private message to Ricdelros.
Find More Posts by Ricdelros. Quote: Originally Posted by Kaplaars Wow, very nice and interesting project! Posting Rules. Similar Threads. Audio Research SP-5 recap question. Audio Research SPA-1 modified SP 10 Service Manual. Frequently Asked Questions Did you forget your password?
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Vinyl record playback has been an integral part of Audio Research since our founding in Even after the introduction of the compact disc in , phono sections remained a revered part of our preamplifiers. The first Audio Research phono preamplifier in a separate chassis was introduced in After all this time, we are proud to finally introduce the first two-chassis phono preamplifier in our history, the Reference Phono This model number was designated because it mirrors its line-stage counterpart, the Reference 10, providing an unsurpassed level of performance in its category. The interactive touch screen allows the user to change inputs and input names , equalization, loading, gain, muting, foreground and background colors of the display, display intensity, and tube hours.
Audio Research SP-12 Vintage Stereo Tube Preamplifier; SP12
Used Quests can be had within your budget. The DA08SE is a surprising 8 on a 1 to 10 scale on this test. I was quite thrilled. So Audio Note makes a bunch of levels for each amplifier type - a B like the Quest comes in several iterations. Limited Time Sale Easy Return. Code: Year of production: actual production. The amps were built on square metal chassis painted a matte gray and had a beautiful to me "'s industrial" type look as Min of TAL calls it.
Fans of Audio Research Corporation?
Post by pinenut » 25 Jul Post by pivot » 25 Jul Post by NewOldVinyl » 25 Jul Post by jc3 » 25 Jul Post by pivot » 26 Jul
Audio research preamplifier
Hi, First I would like to say that this preamp will surely sound really good since it already does even with the issue I'm having I built this preamp about 2 years ago since I wanted to familiarize myself with tubes. Had a couple hiccups and made everything work but a humming sound was there and I don't believe it was ground loop. I couldn't figure it out so I let it sit there collecting dust for a long time I recently started to go back on that SP preamp when I had spare time at night. I've removed every AB resistors since they were old and non matching.
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There are now two system of high fidelity, monophonic monaural and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound. Scott ' Pagine Home New Classic Disclaimer.
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Stereo Tube Preamp Kit All analog design and a retro look. Tube-based buffers provide no gain, but do offer a low output impedance and can deliver the current needed to drive capacitance-laden cables. Return Policy: View Return Policy.
Together with Stereo Exchange. Full featured all-tube preamp from Audio Research - featuring no less than 12 tubes in the preamp stage and three in the power supply In great condition, the front faceplate is super clean and without scratches or dents. All knobs are clean and the writing is perfect.
The audio side of the preamp comes courtesy of. Another good model for newbies is the Fluance RT81, which has a built-in phono preamp, a simple setup, and a great audio performance. Meet the budget-friendly Technics SLC that will only set you back. Free Shipping. Subscribe to posts. Special Offers polo 15 alloy wheels near me and get free shipping. Best Offers cover mi5 men ideas and get free shipping.
During their time, the hi-fi equipment here not only set the standards but also raised the bar for products to come. They tend to come from smaller teams or individuals with a vision to create something special and unique. There's a range of hi-fi kit here, including amplifiers, speakers and turntables, but all of them left a lasting impression, whose impact can still be felt and heard to this very day.
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