Jump to content

Search the Community

Showing results for tags '12ax7'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Product Groups

  • StereoNET Merchandise

Forums

  • START HERE
    • New Member Introductions
  • HI-FI AND STEREO
    • General Hi-Fi & Beginners Discussion
    • Stereo Amplifiers & Pre-Amps
    • Turntables, Record Players & Vinyl
    • Cassette and Reel to Reel
    • Digital Sources, DACs, and Computer Audio
    • Music Streaming Platforms
    • Music, Musicians and Bands
  • HOME CINEMA
    • Home Cinema General Discussion
    • AV Receivers, Multi-channel Amps & Processors
    • Media Servers & Source Units
    • Televisions, Projectors & Screens
    • TV - Free to Air & Streaming
    • Movies - Box Office, Blu-ray Releases etc.
    • Remotes, Automation & Security
  • OTHER DISCUSSION
    • Speakers, Soundbars and Subwoofers
    • Head-Fi, Portable & Desktop Audio, Hearables
    • Power, Cables & Electronics
    • DIY Audio Projects
    • Room Acoustics, Construction and Design
    • Showcase Your System & Build Threads
    • Computers, Gaming & Technology
  • CLASSIFIEDS
    • Australia & New Zealand
    • Southeast Asia
    • United Kingdom
    • United States & Canada
    • Great Deals, Bargains, Specials Alerts
    • Wanted to Buy
    • Pay it Forward
  • COMMERCIAL FORUMS
    • art of SOUND
    • Audio Magic
    • Frank Prowse Hi-Fi
    • GC Hi-Fi
    • Gieseler Audio
    • Hulgich Audio
    • HeyNow Hi-Fi - by Geoff Haynes
    • Lenehan Audio
    • Lux Audio
    • Sonic Art
    • VAF Research
  • REGIONAL EVENTS, GET TOGETHERS, AUDIO CLUBS
    • Australia & New Zealand
    • International HiFi / AV Events & Shows
    • StereoNET Official Hi-Fi & AV Shows Discussion
  • OTHER FORUMS
    • StereoNET News & Announcements
    • Content Feeds

Categories

  • Music Videos
  • Movies & TV Trailers
  • Factory Tours
  • Interviews
  • Reviews & Unboxing
  • Funnies - Music Related Only
  • Hi-Fi Shows & Events
  • Other

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


Region


Location


First Name

Found 16 results

  1. Hello, I have been using a phono amp (no brand name) with tubes 12 AX7's. Two of the tubes are the Mullard 10M Master Series. I was having the switch replaced by my technician and he checked the circuitry and tubes. After repairing the switch, he showed me that the phono amp was producing a curve that was 'cut off' at the top. He lent me an Audio Note phono stage (with different tubes) so that I could compare the 'smoothness' of the sound. Sure enough, the sound was sweeter and smoother! He said that the anamoly could be the design of the phono stage otherwise maybe difficult to say. The tubes are all in excellent condition. My question: 1. Does anyone have another suggestion as to why the upper end of the curve is 'cut off' that produces a less than smooth sound? 2. If I were to upgrade my phono to solve this problem, then I would like to keep using my own tubes ie12AX7's Which brands/makes would anyone recommend that uses 12AX7's. Can Audio Note phonos use 12AX7's? Thx for any comments, Bob
  2. Hi all, I am looking for some advice as to where best to source three (including a matched pair) of 12ax7 valves for my minimax phono preamp. It also takes a 6x4 rectifier but not sure if I need /want to replace this. I have the stock valves that came with the amp from Eastern Electric and I’ve had it for 10 years now, just upgrading my main amp and want to try something better that will do the rest of my system justice. (Michell Gorbe/SME m2/9 / Lyra/ Sugden Masterclass/ Goodman Magnum K’s.) I’m bit wary of eBay so would really appreciate some guidance for reputable resellers. I’ve read a fair bit about different types, my budget is a few hundred dollars. Thanks in advance !
  3. Further information: Up for sale is Yaqin MC 100B Integrated tube/Valve amplifier in excellent working condition along with $300 worth of upgrade. This is a true duel mono block amp having 2 seperate power transformer for each channel (hence there are 4 transformer rather than 3 which are on most of tube amps). Pre-amp tubes have been upgraded to Electro Harmonix 12AX7 Coupling Capacitors have been replaced with Mundorf MCap Supreme 1uf. Capacitors are so big that they had to be mounted on chassis rather than the PCB (check photos). These 2 upgrade make this amp comparable to high end tube amplifier. A great sounding amplifier, ready to drive any speakers even less efficient speakers. FEATURES: Preamplifier uses SRPP amplification circuit and Nagao-type inverter, Cathode output circuit to promote. TWO connection mode: Ultra Linear Amplifier (UL) and triode (TR). Duel Mode: INTEGRATED AMPLIFIER mode or pure Power AMPLIFIER mode. The output transformer use audio special alloy and high strength Anaerobic enamel-insulated wire. It uses special coiling process. This amplifier is made with audio special Enthusiast electrolytic capacitor (MKP), capacitive cross-linked and high quality metallic resistance. SPECIFICATIONS: Performance Index Output power: 30W×2 (8O) Triode (TR) connection 60W×2 (8O) Ultralinear (UL) connection Distortion: =1.5% Signal noise ratio (SNR): =90dB (A) Frequency Response: 5Hz~80KHz (-2dB) Input sensitivity: INTEGRATED AMPLIFIER mode: 0.25V / Power AMPLIFIER mode: 0.6V Vacuum tubes: KT88×4 6SN7×4 12AX7×2 (You can also replace it with 6550EH×4 6N8P×4 6N4×2) Dimensions: 390mm x 490mm x 190mm Weight: 30kg I have original box. Pick up from Narre Warren. Happy to post with buyers expenses and arrangements. Photos: PLEASE READ If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you don't include photographs of the actual item being sold, your ad will not be approved
  4. Item: Vintage Siemens e83cc (12ax7, ecc83) triple mica tubes x 4 Location: Perth WA Price: $390 for all four tubes. Free post within Aus (only for purchase of all four). Item Condition: test NOS, low noise Reason for selling: too many tubes Payment Method: EFT, PayPal Extra Info: These are the much sought after ‘triple mica’ Siemens 12ax7 Tubes made in the Siemens & Halske Munich plant in September 1963 according to the acid etched codes on the glass. The e83cc was designed to be a very quiet, long lived and and anti-microphonic tube. These four are indeed extremely quite, transparent and crystal clear in my phono stage and preamp. They tested NOS when I bought them about 6 months ago. I’ve put a couple of hours on them at most. The test results provided by the seller I bought them off are as follows (and marked on the boxes - see photos). Tested on an Amplitrex AT1000 Sr.No.261106 T1=Ia=2.0ma Gm=1500 T2=Ia=2.0ma Gm=1500 Sr.No.206028 T1=Ia=2.0ma Gm=1500 T2=Ia=2.1ma Gm=1500 Sr.No.768632 T1=Ia=2.2ma Gm=1500 T2=Ia=2.3ma Gm=1500 Sr.No.769203 T1=Ia=2.1ma Gm=1500 T2=Ia=2.2ma Gm=1500 Photos: Advertisements without photos of the actual item will not be approved.
  5. Item: Western Electric 420a >> 12AX7 or 12AT7 Tubes with Adaptors NOS - 3 pairs Location: Sydney East Price: $135 per pair plus postage. Without adaptors $110 Item Condition: NOS perfect Reason for selling: NLR Payment Method: Pickup - Cash, Paypal, Bank TT For sale are these great sounding Western Electric 420a /JW 5755 NOS tubes which when coupled with an adaptor (included) function as a superior 12AX7 or a 12AT7. They are much better in many ways than other 12AX7s I have tried, including: Mullard, Telefunken, Amperex and any Chinese tubes (Psvane etc). The most obvious improvements came in bass drive and resolution. Greater timbral information and texture is evident throughout the mids and bass. Glorious textural information not experienced with any of the tubes mentioned above. Dynamics are scary. Clarity is excellent. Designed for very low microphonics… The WE 420a "features special cathode springs which reduce microphonic response. This characteristic is controlled by a "microphonic stability" test for balance in which the tube is tapped at shock levels of 400 - 600G." Very fine wires (springs) just above the top mica can be seen in pics. The specs are a little different from a 12AX7 which has an amplification factor of 100, 12AT7 is 60, and the Western Electric 420a is 70. I have tried the Raytheon 5755 equivalent and as expected the Western Electric sounds better and is reliable (the Raytheon is not). WE is the real deal! I guarantee these will be keepers irrespective of the tubes you are using. Happy to demo against Mullard and Psvane or your own tubes to serious buyers.
  6. Item: Matched Pair Psvane 12AX7-T Mark II Location: Dundas Valley Price: $80 + shipping Item Condition: As New Reason for selling: NLR Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: As new, matched pair of Psvane 12AX7-T Mark II Photos: Advertisements without photos of the actual item will not be approved.
  7. Item: Trio of Electro-Harmonix gold pin 12ax7 tubes Location: Perth - will post within Aus. Price: $88 Item Condition: New Reason for selling: surplus Payment Method: EFT to mobile Extra Info: These are the gold pin version. Current production Russian made tubes. They came as the ‘upgraded’ tubes with my phono stage, but I had vintage tubes I wanted to use. These have never been used. Photos: Advertisements without photos of the actual item will not be approved.
  8. Item: Genelex Gold Lion 12ax7 tube - gold pins Location: Perth- will post within Aus. Price: $48 Item Condition: As new Reason for selling: surplus Payment Method: EFT by mobile Extra Info: This is the gold pin version. Current production Russian made tube. Bought new for project but never used. Photos: Advertisements without photos of the actual item will not be approved.
  9. Item: Matched pair NOS Amperex Hammond 12ax7 tubes Location: PErth - will post within Aus. Price: $325 Item Condition: NOS - As new Reason for selling: surplus Payment Method: EFT by mobile Extra Info: Made for Hammond organs by Amperex in the Herleen plant in Holland in 1967. These were NOS when I bought them. Tested 72/73 and 73/73 by original owner on a Hickock (min good is 50/50) . I bought four and currently use two of them in my phono stage. I’ve only plugged these two in to test for this sale and confirm they play beautifully in my setup. I was keeping them as spares, but better they go to a good home and get used. They have a big, luscious, sweet and slightly warm sound IMO. I absolutely love them. Photos: Advertisements without photos of the actual item will not be approved.
  10. Item: Matched pair Telefunken 12ax7 tubes Location: Perth - will post within Aus. Price: $280 Item Condition: excellent - test as new Reason for selling: surplus Payment Method: EFT to mobile Extra Info: Ribbed plates. Tested as new With matching results by previous owner. I had them as spares but they’re using up too much space in the house. They sound clear, super detailed and quiet in my phono stage. Heaps of air and tons of seperation IMO. Photos: Advertisements without photos of the actual item will not be approved.
  11. Item: Telefunken 1950s red tip medical 12ax7 tube Location: Perth - will post within Aus. Price: $190 Item Condition: As new Reason for selling: surplus Payment Method: EFT to mobile Extra Info: Ribbed plates. Tested as a new tube from person I bought it off. I only tried it out for an hour or so in my phono stage. Clear, detailed Telefunken sound with stacks of separation and a huge soundstage. A really 3D tube in my setup. Very quiet. Photos: Advertisements without photos of the actual item will not be approved.
  12. Hi all, Just wondering if anyone here can advise on what good or bad results you've had with current production EL84's? They will be used in a Leak Stereo 20 power amp. Ones of interest so far are JJ's and Mullard re-issues but I've only just started the search so any suggestions much appreciated. If there was a Winged C el84 I'd be onto that as I've found there el34's and 6L6's to be excellent but as far as I know Svetlana never made Winged C el84's. Cheers, Legs11
  13. Item: Various tubes Location: West Footscray, VIC Price: Please see description Item Condition: Excellent Reason for selling: Sold my tube amp, so NLR Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: These tubes came with, or I bought for, my Opera Consonance Cyber-100 integrated amplifier which has now been sold. Clearing up as I do not have any use of these tubes anymore. All of these are in perfect working condition and have had very low hours on them as the amp itself was sold in around 7 month's time. Sovtek 5AR4 x2 $40 Came fitted brand new with the amp. I changed to Gold Lion rectifier in few days, so these have had probably a week's worth of usage tops. Price for the pair. EH 12BH7AEH x2 $25 Came fitted brand new as the driver tubes with the amp. Changed to other tubes in few days. Probably had a week's worth of usage. Price for the pair. Sovtek 12AX7LPS $15 Bought to experiment with the preamp tube. Very low hours. Genalex Gold Lion ECC83 Gold pins $30 I was using this as the pre tube in the amp, but I sold the amp with Tung-Sol tube. This may have had no more than 50 hrs of usage in total. Can be picked up from West Footscray, or CBD. Or I can post at cost. Thanks. Pictures:
  14. Item: EAT ECC803S matched Location:Perth Price: $OLD Item Condition: Preowned but New. Reason for selling: Surplus, no longer required Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: I bought these sometime ago with a plan to use them. However the plan was never eventuate...! More infor here; http://www.theaudiotubes.com/eat-ecc803s-12ax7-with-cool-damper.html Pictures:
  15. Item: 12AX7's vintage, and 12AT7 Location: Winmalee Price: $70 Item Condition: Excellent Reason for selling: Not my tone Payment Method: Pickup - Cash, COD Only Extra Info: Lovely dutch 12AX7 tube, very nice in P1 of a tube guitar amp. Rich mids and smooth treble. $70 2 x AWV 12AX7, Australia, Long smooth plates, halo getter, very clean, excellent for P1 of a guitar amp also, late breakup, great for Fender tones. $120 Also up for sale a Dutch 12AT7 marked as triangle OD. $40 Pictures:
  16. Item: A Pair of Telefunken 12AX-7 Smooth Plate (selected tube if possible) Price Range: $250 - $300 Item Condition: New or Used Extra Info: Looking for a pair of TFK 12AX7 Smooth plates, preferably selected tubes. Do let me know if anybody is willing to part with theirs. Cheers.. Please don't forget to report your post as FOUND when possible. (You can now delete this text).
×
×
  • Create New...
To Top