diyAudio > Amplifiers > Tubes / Valves

Pages : 1 2 3 [4] 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88

751. ef86 based preamp
752. 12FQ7 Why and will it be shortage?
753. Trouble w/ Maida regulator bias supply
754. impedance calculations
755. calibrate stark 8-77?
756. EZLoad Dummy Load
757. Best kit for a rookie tube builder
758. schematic question? 805 feedback
759. 6av5ga distortion spectrum
760. Single stage line with anode-cathode feedback
761. VNAV' SUMO Contest 2011
762. Direct heated triode (dht) cathode bypass: different options
763. choice of driver for RS 241
764. Wiring up 3 6.3 Volt Heaters to a 12V supply
765. Adding LED's to my tubes4hifi sp6 preamp
766. Stripped down HK A-300
767. Westrex 2332A amplifiers
768. Leak st20
769. Where could I find these sockets???
770. Hammond L-112
771. 4-pin tube socket spring clips
772. Quad FM1 tuner, could be in wrong section
773. My first tube amp and speaker build I'm loven it
774. 211 IT amp, battery vs fixed bias
775. 300B Tube Failure
776. how to see if a Mullard 12ax7 reissue is long or short plate
777. Can capacitors, how do they fail?
778. Long Preamp to Power Amp Cable Lengths
779. My time at Hovland - HP-100 Lore
780. hybrid quad design
781. TooB NooB: Options?
782. Preamp grounding
783. Express PCB and POV-ray
784. Looking for circuit of SE amp. for 4D32
785. 865 tetrode in triode mode...WOW !
786. MP-2A preamp
787. Is a 7 watt per channel amp enough
788. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
789. Transformers
790. Pentode curves for GU 50 SE amp with 700V B+
791. Valve op-amp pre ?
792. Use only half of OPT secondary?
793. On/Off cycling
794. Tube operating points help
795. OTL Heater Questions
796. tube output question
797. RIAA LCR Mythos
798. first tube amp
799. M135 retubing and eventual modification
800. Taylor 211 vs. GE 211
801. regulated
802. What should I do with these eico hf-12's?
803. Dynaco mk3 clone hum issue
804. First DIY project, which SE tube amp should I build?
805. 6n11 tube headphone amp
806. Kt88 Pin alignement problem=did a mistake
807. LTspice Frustration...help, please..
808. Bias mods
809. Maida tracking preregulator?
810. 230 VAC to 2*140 VAC transformer - 20VA
811. Re gettering?
812. Distortion rise on OPT
813. How to build a transconductance tester for small driver tubes?
814. Musical Fidelity X-10D Cap Mod
815. 6N3 & 6E2 tubes.
816. help with local nfb
817. What should I build
818. leak st20
819. Wright Audio WPA 3.5 Humpot & schematics
820. the old light bulb trick
821. Dynaco ST70 KIT - your opinion please
822. Wire for tubes using a plate cap?
823. Lundahl LL1660 OPT Franks 6SN7 linestage
824. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
825. Tomiko 10k PP transformer?
826. Powerdrive for higher grid wattage A2 transmitter tubes
827. Marantz Model 5 Amps and Model Seven Preamp
828. How to calculate output transformers
829. Grounding considerations with external PS
830. Cathodyne fet buffered balanced line out
831. 807pp + input phase splitter
832. leak st 20
833. Questions about Champ mods, NF loop and more
834. Does anyone know what this is!..???
835. Thought Exercise: Submini Circlotron OTL Amp
836. Preamp Grounding PCB
837. Manley 440: Tubes red cherry after replacing old tubes with new ones
838. EL95 Parallel Push Pull design
839. What is the ideal low-noise heater power for high-power output tubes?
840. Beijing 6N6T
841. Tube recomedations for my first tube amp
842. Tube Load Lines and B+
843. Hybrid rectifier possible in PSUD?
844. Hickok calibration
845. Bias voltage slower to come up
846. Can You Reccommend a 6922 tube?
847. Miniblok Resistor Parameter Modulation using Pots
848. gm70 driver tube tests
849. 300B Globe physical dimensions
850. DIY Fisher 800b into a mic pre
851. OPT Modification Question-Help please?
852. Cant find origin
853. Fixing Sneaky Oscillation in P-P Amplifiers
854. fu-29 Audioromy
855. Almarro A205A as experimentation platform
856. Thoughts on layout and potential for improvements
857. What is the difference between "rectifier tubes" and "power tubes"
858. uTracer...
859. EL84/UL84 single valve amp
860. Mic preamp - strange high frequency roll off problem
861. Tissbury audio
862. midification to srpp preamplifier input voltage
863. DHT SE amp with ultrapath
864. Tube mic preamp problem
865. Output transformer: reasons for destruction?
866. Bewitch KT88
867. SE OPT Wiring
868. maggie 185 to stereo guitar amp?
869. Budget 300b tubes recommendations
870. Hum problem through one channel
871. Audio Research LS22 DIY
872. 300V Tube Power Supply From 120VAC Without Rectifier?
873. NOS Tube: Black Spot on Getter Flashing? Help
874. FET Source Follower Distortion
875. TUBE/MOSFET/BJT hibrid amp
876. PYE Black Box amplifier
877. Tube tester
878. what OPT for 211 parallel SE amp?
879. Opinions for 6550 bias.
880. 832A as a Single Ended Tetrode Amp?
881. DCPP - "Engineer's Amplifier" : Need a bit of help
882. quicky rebuild 6v6 to 807
883. Old fire bottles.
884. Regulated Power Supply using 6550
885. GU50 SE vs 300B SE tube amp??
886. Help with voltages
887. New to valves & this forum.
888. new amp 2a3 pp
889. Telefunken EL153 SE circuity
890. RH 84 Variation: Direct Coupled Pentode
891. Single Transformer, two valve rectifiers
892. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
893. Tube Screening Cans
894. PSU grounding
895. 6AX4GT TV damper
896. plate on chinese 6L6 red on one side
897. FM stereo decoder
898. Under the Christmas Tree - Valve Amplifiers 4th Ed.
899. Using those dern 1625 tubes: a simple SEP amplifier
900. Pairs of resistors in opposite directions
901. 45 spice model
902. APEX 460 Tube mic modification
903. EL84 and 6BQ5 are Same?
904. Simple hybrid amplifier (35W/8Ohm)
905. Yaqin mc 10l or qinpu 6000 mkii
906. Reported attack site?
907. LCR RIAA Phono with DHTs
908. New Here -Would Like to Build
909. 12E1 push pull poweramp
910. marantz model 9
911. I would appreciate some helpfull advice from Aikido builders
912. Dynaco ST70 big Snorting noise.
913. Good Soft Distortion
914. magnavox 8301 revamp, need's a second look
915. Circuit or schematic for current source of 7.5mA
916. Sakuma's bleeder tubes and series connected transfomers
917. Tube measurement
918. adding tone control to SE 6v6 amp
919. Easy Little 6L6 SE
920. knight KA-55
921. Hum in tube amp
922. Lundahl LL1660 10 mA Alt V
923. 12au7 valve preamp (again?)
924. Simple DC heating question
925. 6146B?
926. Reduce gain on power amp?
927. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
928. AC heaters question
929. Anyone tried this Mcintosh c22 knock off.
930. Help me to find pins for tube socket
931. HT delay pcb...
932. Power supply, heater questions...
933. Heathkit AA-151, to separate pre-amp advise needed?
934. grounding
935. 2 Stage GM-70 amp in A2... possible?
936. GlassWare Janus Shunt Rectifier Tube Swap
937. Schematics
938. SE 6B4G driver tube options?
939. seeking datasheet of 6J2B-V in english
940. Nailing Hum in my Phono Stage
941. Shaving voltage off HV supply?
942. LEAK T12 and POINT ONE - worth having ?
943. Quicksilvers Mid Mono Schematic?
944. Russian & East European Tube Factory Logos
945. Lampizator Channel
946. RIAA triode or pentode
947. Cute Little Tube Oscilloscope, Thought I'd share.
948. Is it really possible to deliver 2W into 40 ohms with an SET ?
949. se
950. Connecting Two Amps to Common Input
951. Wiring Aikido using LSA/HPA switch
952. Most exotic SET power amplifier
953. Help with rogers cadet 3 integrated
954. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
955. tube amp hum........normal or suggested fix?
956. Becker Brescia auto radio
957. Double feedback pentode Power Stage
958. Anyone Using Guiguang 300b tubes?
959. Where to get Audio Note Gaku-On service manual?
960. Sanity Check - Input Transformer Overshoot
961. TOA HA-355 vintage tube PA amp schematic
962. EL34 PushPull UL Amp
963. 6L6G emission too high
964. Need help designing BIAS circuit for old Bell amp
965. Heathkit A-5A 6L6 PP Integrated Amp
966. Where to put the meter
967. Radii GS-40pp
968. Concept dilemma (pre/pwr/spud content)
969. What to do with these Eimac tubes?
970. Driving 211 with VT25 or EL34?
971. DIY AMP start project - Help choosing one
972. Pilot 248B Amp with weak channel
973. 6H30 VA stage?
974. What is the best way to connect DC filaments?
975. suggestions for a parallel feed 45 amp?
976. Counterpoint SA 5.1 repairs
977. The Morgan Jones mini tube headphone Amplifier
978. Borbely headphone amp
979. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
980. Floating OPT oscilloscope measuraments
981. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
982. Channel voltage mismatch
983. OS70/1750 datasheets
984. Beautiful Chassis
985. 6A4, 46 and 47...excellent sound tubes !!!!
986. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
987. Quicksilver M135 Schematic?
988. recognize this old amp?
989. grey fogging inside 6sn7
990. Point to point or pcb?
991. Quad query
992. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
993. Found Original Genalex 12AX7..Need Advice..
994. OPT power rating and amplifier power
995. 6BG6-GA
996. EL84 driving EL84 SET with fixed bias
997. P2P 6CG7 Input Buffer
998. 865 in triode mode...anyone ever tried it?
999. PP KT88 Amp Low frequency Ringing
1000. World audio designs kel34