www.hificollective.co.uk has been created to offer hi-fi diyers the ultimate one stop website for hifi parts amplifier parts. Whether you build you own valve amps from scratch, dabble in speaker design, a component tweaker or a true beginner, you will find us a great source of knowledge and resources.
Its founder, Nick Lucas, cut his teeth in the diy sector working for World Audio Design, running the kits division of Hi-Fi World Magazine for 10 years. Hi-Fi Collective Ltd started trading in May 2003 and has grown steadily ever since with a simple ethos close to heart - offer customers a wide range of products and dispatch it immediately. First and foremost we are a component online seller, we stock a wide range of brands and are always on the lookout for new products that would be of interest to our customers.
Component products:
Resistors - Audio Note Tantalums, Shinkohs, Holcos, Allen Bradley, Mills and Kiwame Capacitors - Audio Note Paper in Oils, Black Gates, Mundorf,
Look like a wonderful preamplifier. Thanks for the excellent build video. I am seriously considering this amplifier over the Dynaco PAS-3X. This amplifier should drive my Dynaco MKIII momobloc power amplifiers just fine. I am pleased to see multiple LINE inputs as well as what I think is a very well designed PHONO in.
Stop stealing our words. A passive device is NEVER an amplifier regardless if resistor, transformer or miles of wire! The correct name is passive ATTENUATOR! That is all that it is, perhaps not a sexy name but accurate.
How can it be called a preamplifier. If it has no gain, it's an attenuator. If it has no gain or it attenuates, it will then need a REAL preamp to make up for the lost gain. A completely pointless waste of money.
Great stuff. I built one of these a few years ago, and 300B’s are just a beautiful sounding tube, Yeah, no feedback. I bypassed the headphones though. It’s amazing set to low gain and running a tube based preamp and tube based phono pre through it. Nice synergy. Also sounds fantastic on high gain with just the phono going through. 300B’s can give more oomph than I think they get credit for. My 2 main pairs of speakers are 95dB in sensitivity / 8ohms. 8wpc is more than people think. Awesome job. It was fun watching someone else build one. 😂
This amplifier looks like an interesting product, but I'll have to wait a while to buy it. With the new import taxes in Brazil and the devalued currency, it's impossible to import. Remember, folks, where the radical left comes in, common sense goes out and confusion comes in!
Looks like everything’s coming out great. I built one a few years back, and it was nice to see that the kit was upgradable with the Lundhal transformers and Takman resistors. The OPT in a tube amp can of course make a big difference in sound quality. I’ve no doubt the stock ones sound great, but it’s nice to have the option. Thanks for showing the process so far.
This is a GREAT video and thank you! What is that black thing on the stand to your right that you use when you solder? Is it blowing cool air onto the board or is it sucking the air away like exhaust? Thanks - Dana
Hi id like to know if the chineese switch ladder is good enough, if i change resistors for the quality resistors. So if not what switch to buy at reasonable price ,im searching stereo switch.thanks
As an owner of many tube amps and no local amp repair tech, I bought this tool to help me maintain my tube amps. I am not an electronics engineer and needed a good tool.
Thanks for the advice using the power cable instead of just touching the cap!!! My Oscilloscopes is one of the cheaper models and it doesn't have the sensitivity for the finger method, with your tip I can measure my caps no problem! Awesome
Hi you would pick the same impedance as the original potentiometer. Normally you want to follow the same input impedance of your amplifier, so for solid state it would be 10K or 20K, and for valve amps - 50K, 100K and in some instances 250K
white and black markings? That's pretty dumb. Personally, I prefer soldering over screws, that loosen or will not work with a few big rectangular solid core strands. Thanks for sharing. Kind regards.
Watching you make this RCA cable was like watching paint dry and made me more determined never to bother making my own cables... Don't give up your day job by the way 😂
NOT REQUIRE UPGRADE SPEAKER CROSSOVER!!!!! ALL THE DRIVERS REQUIRE HIS OWN CROSSOVER NOT DRIVERS IS COMBATIMBLE ALL CROSSOVERS! SPEAKERS PIONEER ALL THE DRIVERS AND CROSSOVER IS PIONEER!
Good luck trying to find an 'upgrade' or 'expansion pack' to test a 300B. You'll be waiting forever because this gadget will NEVER be able to achieve the voltages required. It looks like this tester weighs less than 1KG where a tester for a 300B will need some serious step-up transformers to achieve the 400V+. A suitable machine for a 300B would weigh about 15Kg+ This looks no better than the underwhelming VT-1000 machine.
Hi Sir, can i ask some help if you know some online store that can i buy ste attenuator potentiometer 100k for pioneer Sa6800ii model? Thank you very much.
It was interesting until you mentioned the directionality on the cable. It's an alternating current, the current 😂moves backwards and forwards along the speaker cable. I'm not sure there is enough current to realign crystal structure in a metal.
So, If you are replacing a logarithmic 150K stereo volume potentiometer in an old receiver, you skip the series resistor? Any idea what the formula is for calculating the 22 resistor values? Regards, Bo Andersen
Man I was really hoping the update would expand to more pro audio tube types. I love the MkI, use it all the time for ECCs and such, but it only can test half the tubes I encounter in preamps and compressors. Im sure the market is much more limited, but would pay 3x the price of the one I have for something so simple, but with more tubes programmed into the CPU.
