Search found 109 matches

Re: Jurassic soundcards: Yamaha 2416 DSP factory

I'll never understand the rationale of manufacturers, no more than I know why toast always lands butter side down, but the SW1000XG was a cracking card, if only Yamaha had released 64bit drivers for the audio side of the card - a perfectly adequate MIDI synth and 12 channel audio all in the same ca...
by jjlonbassWed May 01, 2024 1:06 pm
Forum: Recording: Gear + Techniques Topic: Jurassic soundcards: Yamaha 2416 DSP factory Replies: 23 Views: 694

Re: Jurassic soundcards: Yamaha 2416 DSP factory

I'll never understand the rationale of manufacturers, no more than I know why toast always lands butter side down, but the SW1000XG was a cracking card, if only Yamaha had released 64bit drivers for the audio side of the card - a perfectly adequate MIDI synth and 12 channel audio all in the same ca...
by jjlonbassWed May 01, 2024 8:28 am
Forum: Recording: Gear + Techniques Topic: Jurassic soundcards: Yamaha 2416 DSP factory Replies: 23 Views: 694

Re: Farfisa Find.

This will be too modern to have germanium transistors like the OC71. I'd imagine it will have a load of ordinary silicon transistors possibly in metal cans like BC109 etc, some, possibly many, TTL logic ICs and possibly the top octave generator and divider ICs used in many '70s electronic organs. John
by jjlonbassThu Apr 11, 2024 4:10 pm
Forum: Keyboards + Synthesizers Topic: Farfisa Find. Replies: 70 Views: 1638

Re: Trio KA1500 Amp Reapair

Anyway, back to diagnosing the fault. Cm22 is a very likely candidate for the cause of the fault as it decouples the supply quoted as 11.4V that is applied to the first transistors Qm1 and Qm2 in both channels of the phono preamp. Other likely capacitors are Cm23 that decouples the 28V supply to bot...
by jjlonbassMon Dec 04, 2023 1:06 pm
Forum: DIY Electronics + Studio Design Topic: Trio KA1500 Amp Reapair Replies: 37 Views: 667

Re: Seeking advice regarding an unhappy Rode NT1000

I've only heard an airing cupboard being referred to as a hot press in Ireland. I didn't know that term is also used in Manchester.

John
by jjlonbassTue Nov 07, 2023 1:37 pm
Forum: DIY Electronics + Studio Design Topic: Seeking advice regarding an unhappy Rode NT1000 Replies: 19 Views: 925

Re: Make strings last longer

I find that storing each of my basses in their case / bag when not in use makes the strings last much longer than when an instrument is left on a stand in the open air.

John
by jjlonbassWed Jul 26, 2023 9:41 am
Forum: Guitar Technology Topic: Make strings last longer Replies: 27 Views: 758

Re: Restoring a vintage Sony/MCI Console

I agree that it's a bad idea to re-use IDC connectors - I'm sure that you really don't want to take the whole thing apart again when they become unreliable.

John
by jjlonbassTue Jun 27, 2023 10:10 am
Forum: DIY Electronics + Studio Design Topic: Restoring a vintage Sony/MCI Console Replies: 36 Views: 2225

Re: Roland TR-606 hum when LEDs are on ...

voltage across c105 : volmeter dc 5.81v This looks a bit lower than I'd expect. What DC voltages do you measure across D40 (or C103, they should be the same thing) R235 R236 (R2 in your diagram) You say that you replaced Q42, what type of transistor did you replace it with? Did you replace Q41? If ...
by jjlonbassThu May 04, 2023 5:34 pm
Forum: Recording: Gear + Techniques Topic: Roland TR-606 hum when LEDs are on ... Replies: 31 Views: 1201

Re: USB C

That's because there is yet another standard that uses USB-C connectors namely DisplayPort 2.0 and upwards. This transports DisplayPort video data via USB-C cables - this is what your Steam Deck provides. This differs from Thunderbolt in that only either DisplayPort or USB are transported and not PC...
by jjlonbassFri Apr 07, 2023 9:44 am
Forum: Windows Music Topic: USB C Replies: 30 Views: 1310

Re: USB C

When I bought a hub for my Steam Deck I was told that USB-C and Thunderbolt are the same thing. I'll admit I was confused, but the hub he sold me works, so... Recent Thunderbolt devices use USB-C connector but Thunderbolt is not USB, although, confusingly it's likely to be compatible. Yes that's wh...
by jjlonbassThu Apr 06, 2023 3:34 pm
Forum: Windows Music Topic: USB C Replies: 30 Views: 1310

Re: PC upgrade for Cubase Pro 12

The Core i7 name was first used for the higher end of the Nehalem range of 45nm processors released at the end of 2008.

John
by jjlonbassWed Mar 22, 2023 12:44 pm
Forum: Windows Music Topic: PC upgrade for Cubase Pro 12 Replies: 12 Views: 884

Re: SanDisk Ultra 64Gb for pennys

They're both RAM. An SD card is static RAM -- it keeps the data when the power is off, and RAM for a PC or Mac is dynamic RAM, or DRAM, which loses the data when the power is off. DRAM might be better called 'forgettory' than memory, as it needs refreshed constantly to remember the data. It is, tho...
by jjlonbassMon Feb 20, 2023 5:17 pm
Forum: Recording: Gear + Techniques Topic: SanDisk Ultra 64Gb for pennys Replies: 9 Views: 534

Re: Smart Plugs in the studio - good idea?

Yes, a remote handset is a digital device and modern types are almost certain to contain a microcontroller running some software, but it doesn't necessarily follow that a remote is likely to fail. It is possible for such systems to be reliable and a remote handset being a very simple system helps wi...
by jjlonbassFri Jan 13, 2023 11:10 am
Forum: DIY Electronics + Studio Design Topic: Smart Plugs in the studio - good idea? Replies: 57 Views: 1806

Re: Smart Plugs in the studio - good idea?

I'm not familiar with remote handsets for smart plugs, but the ubiquitous TV remote is, in effect, listening at all times. When no remote button is pressed, the remote's microcontroller will be in a very low power "sleep" mode where it is waiting for an interrupt from a button to wake it u...
by jjlonbassFri Jan 13, 2023 8:39 am
Forum: DIY Electronics + Studio Design Topic: Smart Plugs in the studio - good idea? Replies: 57 Views: 1806

Re: Smart Plugs in the studio - good idea?

Perhaps, but your remote control handset is most definitely a digital system - it will probably contain a low power microcontroller of some description.

John
by jjlonbassThu Jan 12, 2023 10:51 am
Forum: DIY Electronics + Studio Design Topic: Smart Plugs in the studio - good idea? Replies: 57 Views: 1806

Re: Behringer UMC1820 vs Presonus Quantum 2626

Anyway, what would be your thought regarding the whole CPU usage/DMA thing please? It's a topic thats really outside my area of competency I'm afraid. Hopefully someone who really knows this stuff can advise. USB host controllers (the part that is in the PC, Mac or whatever) have used DMA since the...
by jjlonbassMon Jan 09, 2023 11:55 am
Forum: Mac Music Topic: Behringer UMC1820 vs Presonus Quantum 2626 Replies: 13 Views: 4973

Re: Behringer 2600 Oscillator "Leakage" - VCF Gain too Low

Apparently Joe Zawinul had a similar issue with his ARP 2600 when he first got hold of one. I suppose that means I'm in good company :oops:

John
by jjlonbassTue Nov 22, 2022 1:20 pm
Forum: Keyboards + Synthesizers Topic: Behringer 2600 Oscillator "Leakage" - VCF Gain too Low Replies: 10 Views: 1334

Re: Behringer 2600 Oscillator "Leakage" - VCF Gain too Low

I did sort this out - it was due to user (me) error. I had the VCA initial gain set to a non-zero value such that there was some output at all times.

John
by jjlonbassMon Nov 21, 2022 8:57 am
Forum: Keyboards + Synthesizers Topic: Behringer 2600 Oscillator "Leakage" - VCF Gain too Low Replies: 10 Views: 1334

Re: DIfference between i7-12700K Adler Lake and i9-12900 Adler Lake CPUs.

The Core-i9 has higher turbo speeds, more cache and higher maximum power consumption. Links to Core-i7 and Core-i9 details.

John
by jjlonbassFri Sep 16, 2022 3:51 pm
Forum: Windows Music Topic: DIfference between i7-12700K Adler Lake and i9-12900 Adler Lake CPUs. Replies: 2 Views: 237

Re: The Neve 88M

I have a mu-metal tale. I worked at Solid State Logic (SSL) for about a year starting in August '88. At the time, their 4000 series mixing consoles had a small CRT monitor built into the centre section. In order to shield the surrounding analogue circuitry from the strong EM interference generated b...
by jjlonbassWed Sep 14, 2022 10:55 am
Forum: Recording: Gear + Techniques Topic: The Neve 88M Replies: 42 Views: 3308

Re: Recommendations for Sound Card for New PC Build

The ESI Juli@ is a conventional PCI card, not PCI Express (PCIe). Current PCs don't have conventional PCI slots, so you'll need to retire your ESI card or maybe sell it on.

John
by jjlonbassMon Sep 12, 2022 1:35 pm
Forum: Windows Music Topic: Recommendations for Sound Card for New PC Build Replies: 8 Views: 483

Re: How do I tell if my DC PSU is switched mode or linear?

That blue model 119603 Power Plant will be a linear type - clues to this are the relatively low maximum total output of 500mA at 9V, the 230V only mains input and the fact that it has a 12V AC output in addition to the DC outputs.

John
by jjlonbassMon Sep 12, 2022 7:37 am
Forum: Guitar Technology Topic: How do I tell if my DC PSU is switched mode or linear? Replies: 11 Views: 3119

Re: How do I tell if my DC PSU is switched mode or linear?

The Power Plant Junior could be linear, there's probably just about enough space in the enclosure for a 15VA or so mains transformer. It would be tight squeeze though and I think it's just as likely to be switched mode. The ISO-1 AC PRO is definitely switched mode - it has universal mains input, has...
by jjlonbassTue Sep 06, 2022 10:52 am
Forum: Guitar Technology Topic: How do I tell if my DC PSU is switched mode or linear? Replies: 11 Views: 3119

Re: Vox VT100 amp

That is a very odd circuit around the 12AX7. The 2 triodes are biased from a -51V supply, but the anodes' DC supply comes from the unity gain inverting op-amp circuits around IC2A and IC2B which in turn are driven from the triode anodes, IC2A by a DC blocking capacitor! I'm not sure what is going on...
by jjlonbassMon Aug 15, 2022 6:06 pm
Forum: Guitar Technology Topic: Vox VT100 amp Replies: 14 Views: 870

Re: Snake oil - we have a winner?

That's pretty much how the familiar Ethernet over twisted pair cabling works - signalling is differential i.e. there is a "+" and "-" wire per lane that carry signals with opposite polarity and there is a transformer at each end of the link to provide galvanic isolation. See here...
by jjlonbassMon Aug 01, 2022 7:43 pm
Forum: Recording: Gear + Techniques Topic: Snake oil - we have a winner? Replies: 49 Views: 2286

Re: "Chip shortages hit hard at Yamaha's musical instrument business"

I don't think that you'd find any EPROMs in a car made in the past 25 years or so. Flash memory has been in pretty much universal use in high volume electronics for a long time - the most recent new design project that I worked on that used an EPROM was back in 1991. Also, cars and other volume prod...
by jjlonbassThu Jul 28, 2022 10:32 am
Forum: Music Business Topic: "Chip shortages hit hard at Yamaha's musical instrument business" Replies: 5 Views: 461

Re: Why are there so many DC barrel connectors?

Barrel connectors have been around a long time, most likely since the '60s. I had an ITT radio that was first released in 1972 that had a barrel socket to connect to a "battery eliminator".

John
by jjlonbassFri May 13, 2022 9:30 am
Forum: DIY Electronics + Studio Design Topic: Why are there so many DC barrel connectors? Replies: 31 Views: 1317

Re: Powering USB devices, MacBook.

Indeed. Older USB 2.0 hubs would use a single transaction translator (TT) that, when any full speed (12 Mbit / second) or low speed (1.5 Mbit / second) USB 1.1 device was connected, would limit all ports to at most a 12 Mbit / second transfer rate. More info here . Most, if not all USB 2.0 hubs made...
by jjlonbassWed May 04, 2022 4:38 pm
Forum: Mac Music Topic: Powering USB devices, MacBook. Replies: 24 Views: 811

Re: Installing (very) old components in a new(ish) PC?

A 12 year old PC will most likely use DDR3 RAM. A current PC will use DDR4, or if it is really brand new DDR5. None of the various generations of DDR RAM are compatible with one another, so, unfortunately, your old RAM will be of no use in your newer PC.

John
by jjlonbassSat Apr 30, 2022 1:21 pm
Forum: Windows Music Topic: Installing (very) old components in a new(ish) PC? Replies: 7 Views: 287

Re: Yamaha digital piano produces no sound

An ESR meter is only useful for testing electrolytic capacitors - it's unlikely to tell you anything meaningful about ceramic capacitors, especially low value ones. Ceramic capacitors tend to be reliable, so I would concentrate on electrolytics first. What ESR reading in ohms do you see for the elec...
by jjlonbassThu Apr 07, 2022 8:47 am
Forum: DIY Electronics + Studio Design Topic: Yamaha digital piano produces no sound Replies: 30 Views: 4026