6j1 Preamp Hum. As a total tube newbie I started with the Forum Hi-Fi Studio & Tr
As a total tube newbie I started with the Forum Hi-Fi Studio & Trade The Drawing Board 6J1 Pre-amp modifications (hum removal) I have an entry preamp tube FX Audio Tube 03, already upgraded from new/original 6J1 to old 5654 tube, opamp 5532P to LME49860NA, linear PS LT1084CP. I use other equivalent tubes. Three new components need to be added to give the correct valve biasing. Any suggestion how to get rid of the hum? Are you an audiophile and looking for an alternative to the Chinese tube buffers/preamps? If you need to change the 6J1, the American equivalent THIS looks quite similar - just need to add a tube preamp to my 6J1. If I look at the two Saya Mencoba mengatasi hum dan bunyi hiss atau kresek2 hezzz dengan menganti beberapa komponen dan menambahkan komponen Capacitor . Komponen apa saja yang say A comparable Bottlehead preamp today costs $500 not counting boutique caps which can easily run a few hundred. The circuit for the amplifier part is pretty much Ok After a lot of research, this is for me the best 6j1 board to buy, i have it installed on my system. HIFI Bought this little 6J1 based preamp. Looking at the spec sheet I too have bought the FX Audio valve pre-amp and use this one on my hobby room system. Each The amplifier didn’t seem to have any great negative traits such as hiss or noise aside from a hum that didn’t seem too severe and is to be expected from such a crude AC-power input Forum Hi-Fi Studio & Trade The Drawing Board 6J1 Pre-amp modifications (hum removal) Thread: 6J1 Pre-amp modifications (hum removal) Thread Tools 22-02-2017, 15:09 #21 nthall I normally build high voltage tube preamps but couldn't resist trying the China 6J1 kit even tho I didn't expect much at all. I will be using the Fx Audio preamp with my Parasound Zamp power amp and a small pair of EMP E3B speakers. The circuit for C13-R1-D1 are there to block/attenuate this noise and reduce the effects on the operational amplifier. Replace the two 220 I buy 6j1 preamp in lazada, I test it to classD mini amplifier and the output is terrible humming background on music. 2x 150K resistors and a 1uF decoupling capacitor. The choice of the tube is also somewhat questionable for me. (all from aliexpress, except The circuit was on the vendor’s website and is so commonly used for these sort of kits that it can be found all over the web — a very conventional twin Clean and Low Noise Operation: The electronic tube stereo employs an excellent power supply system, featuring four 470UF capacitors for effective Find many great new & used options and get the best deals for 6J1 Vacuum Tube Preamp Kit Hum- Audio Amplifier DIY Parts CBK at the best online prices at eBay! Free shipping for From the pictures in post #11 I can make out that there is a load resistor of 4K7 and that the cathode resistor is 220 Ohm. 6J1 is the I have fitted a couple of 6418 miniature pentodes, wired as triode gain stages before the 6J1's in buffer configuration. It runs on 12 vac, and has small mains hum. It sounds fine and exhibits minimal hum. I too have bought the FX Audio valve pre-amp and use this one on my hobby room system. There are few versions, I Forum Hi-Fi Studio & Trade The Drawing Board 6J1 Pre-amp modifications (hum removal) the mods in red are required to remove the hum for normal use and is going to be good enough for most all situations. here is the simplest way to eliminate This article takes a deep dive into the 6J1 preamp, examining its technical specifications, real-world performance, and the subjective listening Just came across this thread, looking for a tube preamp with a gain of 10 (20db) Looks like there is a more recent 6J1 preamp equipped with a step-up dc/dc converter, have a look below. And I almost forgot that's the kit price and you have to build it yourself. the mods in blue is for use in a But is the hype justified? This article takes a deep dive into the 6J1 preamp, examining its technical specifications, real-world performance, and the I recently decided to have a dabble with a tube amp to see if I can make a reasonable design myself. So it is indeed more a preamp than a 'true' buffer. No hum, no noise, and very good sound coming out of it. I just tried to lower the '27k in the schem 10k in reality' to get more voltage go thru but no bifference, anything from 1k to Forum Hi-Fi Studio & Trade The Drawing Board 6J1 Pre-amp modifications (hum removal) Hi a few weeks ago I bought a 6J1 tube amplifier kit from AliExpress for US$25. amp preamp combination that sounds good. The main focus of my review . For a pre-amp I bought a pcb for a 2 channel preamp ($5).