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preamplifier

  1. Sam08861

    Anyone have a recommended capacitor list for the Technics 9070?

    Just got one of these, but has the original electrolytic caps. I have the service manual and can see which are electrolytics and of these, which are non polar. 1. What I don't know how to figure out here is if any should be low leakage/low esr caps. Any suggestions which ones or what to look...
    • Sam08861
    • Thread
    • capacitor preamplifier su-9070 technics
    • Replies: 3
    • Forum: Solid State
  2. B

    Heathkit AA141 preamp 5 - 12AX7 version - anyone with experience

    I've had a Dynaco Pas 2 for a little while, and have been very happy with it. It has the tone controls out and a new rectifier and new caps and all the hoop-lah ... I use it with a Bob Latino ST70 and an original ST70. I just picked up a Heathkit AA141 and hope to emulate the mods/updates...
  3. B

    Audio Research SP11 vs Luxman CL-35 MkIII

    Greetings. I am looking for feedback from those that have heard Audio Research and Luxman gear in their experience. I recently acquired an SP11 hybrid preamp with stock tubes. Plugged it in to the main system in place of a Luxman CL-35 mkIII, and instantly noticed a difference in imaging and...
    • briguy986
    • Thread
    • 12ax7 audio research imaging luxman matsushita preamplifier quicksilver soundstage telefunken
    • Replies: 9
    • Forum: Tube Audio
  4. KDAC

    Dammit! I need help re: preamp and/or amp damage...

    Yesterday I had an electrician at the house attempting to resolve an issue in our bathroom. Between 100 m.p.h. talking and inattentiveness (on his part), it didn't dawn on him (or me and my wife) that the electricity was still on via the junction box in the basement . He touched a connection of...
    • KDAC
    • Thread
    • amplifier electricity malfunction power preamplifier repair service stereo
    • Replies: 22
    • Forum: Solid State
  5. Joel Cairo

    Undoing the **WORST** DIY "mod" ever...! UPDATE: Audio Classics to the rescue!!

    I generally don't shout like that , but I think the piece I just found has to rate as the champion of poor "upgrade" decisions... WARNING - The pics you are about to see are not for the faint of heart! After you get over the raw shock of seeing them (and it may take it a bit), please give me...
  6. jprossi

    Help with ARC Preamp

    Hi all, I've enjoyed reading posts on AK for a while now, but this is my first post. I've recently acquired some new gear: an Adcom GFA-555 and an Audio Research SP-6c. When I got everything hooked up and switched on the SP-6, nothing happened. The green LEDs for "pre-amp on" and...
    • jprossi
    • Thread
    • audio research preamp preamplifier tube
    • Replies: 9
    • Forum: Tube Audio
  7. Byron M.

    Marantz 7 Pre-Amplifiers Different Types ?

    I Know That 7,7c are tube types and 7t is solid state. But on the Tube Types there is a Small Face Plate and A large Faceplate That Some Call 7cr & 7tr but What Is a 7p the rarest of all the Tube Types And Why Rare?
  8. ponitora

    Musical Fidelity The Preamp 3 (USA)

    . Just got this Musical Fidelity Preamp 3 (see pic) shipped from the UK ....I'm in the USA. The AC mains transformer has a center tap conversion re 240 VAC mains to 120 VAC... so of course I did that. Overall this preamp is slightly on the bright side but that is to my taste and the mm/mc...
    • ponitora
    • Thread
    • musical fidelity preamp 3 preamplifier
    • Replies: 0
    • Forum: Solid State
  9. ponitora

    Philips PA-1000B Preamp bias question

    I recently purchased a Philips PA-1000B preamp off ebay, and do like the sound of it. I am wondering about setting the pots -- there are four VR's and I assume two are for output equalization and the other two are for transistor bias? If anyone has any info on setting up these board adjustments...
  10. davstev

    Preamps & my Accuphase C-200

    Hi all, Yesterday in an AK forum exchange it was suggested to me that my Accuphase C200 (circa mid-70s) preamp was a weak link in my system (I have a nice TT/Cartridge and the C-200 is sending a signal to a Kenny 700M and then to Tannoy Golds). This opinion surprised me- I've always thought the...
    • davstev
    • Thread
    • accuphase c-200 c200 kenwood preamp preamplifier
    • Replies: 16
    • Forum: Solid State
  11. E

    What are my 4 RCA BA-21A tube mic preamps worth?

    Hello.. I have a question for the audiokarma world. I'm wondering if anyone can tell me what my 4 RCA BA-21A tube mic preamps are worth. They are very clean and come with a nice power supply BUT they are untested. since they haven't been used in over 15+ years, I'd rather not power them up...
    • Elektric
    • Thread
    • amplifier gear microphone outboard preamplifier studio tube vintage
    • Replies: 10
    • Forum: Dollars and Sense
  12. S

    Bose 4401 preamp issues

    I picked up a Bose 4401 preamp from a foreign seller on the auction site . The ad stated it was fully funtional and it was 120 volt U.S model.I connected it to my Bose 1801 and I only get sound out of the right channel and I have to crank the volume close to the max to get an average level of...
  13. Ntc76

    Magnavox 150aa Monoblocks - best set up

    Hello Folks, I recently bought another 150aa to match the one I have in my 1957 magnificent magnavox. It's the one that is mono with a seperate treble circuit, and it has two 12" speakers and one Jensen R103 metal horn tweeter. What I want to do is use these two as monoblocks with some nice...
    • Ntc76
    • Thread
    • magnavox mono amplifier monoblocks preamplifier
    • Replies: 26
    • Forum: Tube Audio
  14. S

    Carver C-4000 vs. Audiolab 8000C

    I'm looking for a preamp to accompany Odyssey Stratos Monoblocks and Klipsch La Scala speakers. Which would you choose, between the Carver C-4000 and the Audiolab 8000C, if they were priced about the same? Or would you choose something else - what else & why? Solid State or Tube?
    • scoran
    • Thread
    • audiolab preamp carver preamp klipsch la scala odyssey stratos preamp preamplifier solid state tube
    • Replies: 7
    • Forum: Solid State
  15. M

    YAMAHA preamplifier CX 1000 Problem with analog inputs....

    I have the CX 1000 about 5-6 years now along with the MX-1000 power amp. I use it in my dent as a second setup which is more used than my main system as i spend many hours in this room.... It is more than a year now that i have the following problem: I use the analog inputs to hook up a...
    • Manos2010
    • Thread
    • cx 1000 preamplifier yamaha
    • Replies: 14
    • Forum: Yamaha
  16. S

    In search of audio mute relay (Crown)

    My Crown SL-1 preamp has an apparent issue with the audio mute relay. Any suggestions for finding a replacement? I have no idea if this was made specifically for this unit or if it was mfctd for other units or companies. I do know that Crown no longer supports the vintage stuff from the 70s...
    • Stalmer
    • Thread
    • crown pre-amp preamplifier relays sl-1 straight line one
    • Replies: 7
    • Forum: Solid State
  17. Buster Caps

    Yamaha C-50: a learning experience

    Hello! Amateur tech here with great appreciation for and admiration for the mentors on THIS site. I have this Yamaha pre amp from the 80's needing attention. Problems include one channel dropping out, static in balance and volume controls, and the power lamp out. AK threads led me to the...
  18. Buster Caps

    Yamaha C-50 adventure

    Hello! Aspiring amateur audio electronics tech here with great appreciation for and admiration of THIS site. I am happy to discover a truly bountiful resource for those drawn to fixing analog gear problems. Currently, I have this Yamaha pre amp from the 80's needing attention. Problems...
    • Buster Caps
    • Thread
    • preamplifier yamaha
    • Replies: 0
    • Forum: DIY
  19. tunz

    Yamaha C-80

    Have any of you had the Yamaha c-80? Is it any good? I like a lot of the old Yamaha stuff, but have never come across this one.
  20. A

    Another JFET phono preamplifier

    Hello guys! I remembered recently about a Romanian magazine since 1994 where was presented an interesting phono preamplifier based on FET transistors. As previously most listeners preffered to buy or construct either "Le Pacific" or "Boozhound" preamplifier, I decided to come in help for them...
  21. A

    Le Pacific J-FET phono preamplifier

    Hello guys!! Long time ago I decided o try the schematics of the Le Pacific preamplifier. If I try to power the entire bloc from a DC source the hum is higher, so I power it from 3 x 9V battery but they don't last so much. I also placed a 220uF/50V capacitor between + and - for reducing a...
    • andreidaniel
    • Thread
    • boozhound fet fono le pacific phono pick-up preamplifier riaa turntable
    • Replies: 0
    • Forum: Solid State
  22. D

    Preamp Issues - Need a Little Help

    So I recently acquired a set of Thiel CS3.5 speakers and had them brought back up to factory performance by Theil. I am using one of the new Crown DriveCore series amps to drive them with and it sounds fantastic. Up until just a few hours ago, I was using a Denon PRA-1000 preamp with an Onkyo...
  23. davstev

    Kenwood 700C and the Accuphase C200 preamps

    Hi AK'ers, I own a 700M power amp and I love it. But I hate tweaking the super sensitive volume knobs individually on each channel every time I want to adjust volume. I need a preamp! I'd love to acquire a 700C pre since it is the logical mate to the 700M, but they are hard to find and quite...
  24. Organgrinder

    Audionics of Oregon BT-2 Preamp restoration

    Hey all! Thought I'd share my little project for the time being, cause I know some of you love seeing the guts of these old workhorses. Been working on this old Audionics of Oregon BT-2 preamp the last couple days. For the last few months, its been doing daily duty as my phono preamp for my...
  25. avanti1960

    Integrated Tube Amp- Tube Types and Positions vs. Impact on Sound

    Hi, I just got a new tube integrated amplifier and have some questions about the types of tubes in the various positions on the amplifier- 2X 12AT7 (phase inverter) 2X 12AT7 (preamp stage) 2X 12AU7 (first stage power amp) 4X 6L6GC (power tubes) If I wanted to tube roll, which positions would...
    • avanti1960
    • Thread
    • amplifier positions preamplifier tube tube roll
    • Replies: 3
    • Forum: Tube Audio
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