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Everything posted by Passinwind

  1. [quote name='timmo' timestamp='1424528960' post='2697358'] I was just looking at the amps and cabs for sale and saw this. Just didn`t get what the function is, as i thought you would have an amp for all the functions. [url="http://basschat.co.uk/topic/253503-rare-gt-groove-tubes-bass-preamp-swr/"]http://basschat.co.u...ass-preamp-swr/[/url] [/quote] Quite a few of us use pro sound grade power amps in our bass rigs, for one reason because virtually no bass amps make enough power to satisfy some people. Since that power amp doesn't have tone controls and since it typically wants a higher level input signal than our basses provide, a standalone preamp like that becomes necessary. The often large-ish form factor also leaves lots of room for extended functions that are less often seen in integrated bass amps. Floor pedals tend to just provide another tonal flavor, and they can be very handy for getting "your sound" through someone else's rig as well.
  2. [quote name='Chienmortbb' timestamp='1423657235' post='2687466'] So now to order some good parts and check out the latest circuit. [/quote] I just did a bit of benchmark testing in RMAA and saw a few subtle things that may need massaging, but it looks pretty good all in all. These figures are with both the high pass and the parametric EQ engaged, neither of which change the measurements all that much when bypassed.
  3. [quote name='Passinwind' timestamp='1422986178' post='2679196'] Lookin' good, real progress going on. I'm on to final wiring of my set of preamp boards, hope to be up and running by week's end.[/quote] Done, and working pretty well for such early days. Should be safe to stuff those boards now Chienmort.
  4. [quote name='lee650' timestamp='1423354769' post='2683959'] . I had a radial bassbone which dones not have high impedance inputs and it does not drove a power amp very well ( I struggled with my Berg IP, with the bassbone). [/quote] The new Bassbones do have a dedicated 10Meg piezo preamp now, but they are still unity gain pieces and as such are not meant to drive power amps.
  5. [quote name='LukeFRC' timestamp='1421611251' post='2663295'] this is quite interesting thread [url="http://www.talkbass.com/threads/tb11-preamp-project.669517/"]http://www.talkbass....project.669517/[/url] [/quote] Yep, and there's also this one: [url="http://www.talkbass.com/threads/pcbs-for-diy-clone-2-band-preamps.737117/"]http://www.talkbass....preamps.737117/[/url] I built one of those Uncle Fluffy 2-band boards up, did a few of the documented mods, and enjoyed it a lot in my old Travis Bean fretless. This week I just finished up my own version, with a more modern opamp and film caps instead of tantalums. Seems pretty good so far, haven't tried a gig with it just yet though. There is a guy on Talkbass selling bare MM 3-band clone boards ATM, I think: [url="http://www.talkbass.com/threads/diy-stingray-3eq-preamp.883257/#post-12648941"]http://www.talkbass..../#post-12648941[/url]
  6. Lookin' good, real progress going on. I'm on to final wiring of my set of preamp boards, hope to be up and running by week's end. I got diverted by a quick onboard preamp build for my ancient Travis Bean, similar to the MM clone one I sent you last year.
  7. [quote name='pantherairsoft' timestamp='1422299313' post='2670909'] It certainly doesn't look modern, but it does look like it was built to last. We know Berg make stunning DSP for power amps due to the mind blowingly good powered cabs they have out there, so I have high hopes for how this will perform. Looking forward to giving one a whirl. [/quote] I'm really looking forward to checking it out too. The IP series inspired me to roll my own amp with the same OEM power amp/DSP chip set that Jim used. For his sake, hope he used something a lot more user-friendly on the programming end this time!
  8. Passinwind

    Amp class

    Here's a fairly thorough explanation from one of Peavey's amp engineers: http://www.talkbass.com/threads/class-d-illustrated-lots-of-pics.1083366/
  9. [quote name='LukeFRC' timestamp='1421537771' post='2662590'] what's the hard bit? what makes it steep?[/quote] Many of the freeware layout programs have pretty arcane and/or limited component library formats, so I find that I spend a lot of time building my own component footprints. Things like ground plane layouts often still feel like black art to me too. And even for someone like me who has always been pretty used to winging things and "fixing it in the mix" later (rework and mods), I've found little mistakes on almost every original revision board I've done so far. I do find putting in the effort very worthwhile though.
  10. [quote name='BigGuyAtTheBack' timestamp='1421489084' post='2661783'] Hi Charlie, I'm going to Veroboard it as I don't have the facillities to make PCB's. The last time I made PCB's was back in the early 80's when I was an electronics tech. The 741 was king! Just started building it now but the mancave is a bit cold as the wife has nicked my gas heater, slow progress! [/quote] Ah, 741s...can't say I miss 'em much. Getting circuit boards done in small quantities is trivially easy these days, but the learning curve on doing your own board layouts can be a bit steep IME. I'm just finishing up my latest preamp build. I'll post some pics and fluff once I get it all together. It's quite similar to the one Chienmortbb is using in the Amp Build Diary thread and there are pics of my boards in that thread.
  11. [quote name='owen' timestamp='1420717424' post='2652437'] Hypex? [/quote] Nope, ICE 500ASP. [url="http://www.talkbass.com/threads/a-diy-500-watt-bass-head.1061473/#post-15624273"]Build thread here[/url]. I plan on doing a Hypex build eventually though, unless I end up just cutting to the chase and doing my own power module.
  12. [quote name='BigGuyAtTheBack' timestamp='1420624390' post='2651346'] Thanks for the suggestions Charlie. I'll socket the IC's and try the 072's and the OPA2134's just to see if I can hear a difference. I've read a few of your posts on Talkbass, always informative! [/quote] Are you going to use Mr Kreutzer's printed circuit board layout? I had intended to try building that circuit up myself sooner or later, but my plate's a little too full already right now.
  13. [quote name='BigGuyAtTheBack' timestamp='1420571731' post='2650813'] I'll have to look into that one thanks Nick. Passinwind its the Jfet Bass Preamp Ver 2.1 07082002 3 get design with the switchable eq. [/quote] Cool, I'll be interested to see how it goes for you. Personally, I'd at least swap out the first opamp for something a little more modern. My default choice for BiFETs is usually the OPA2132 or OPA2134, although I've been messing with quite a few others recently too.
  14. [quote name='Meatbag' timestamp='1420408317' post='2649136'] Oh my! Will the God of analogue synthesizers ever stop laughing at me? My first Saturday job as a 16 year old yoof was in 1979 at Chase Music in Manchester who were the ARP dealers. I vaguely paid some attention to the products as I sweat my teenage nads off humping those massive boxes around and setting gear up at various roadshows. And Poly/ Mini Moogs, and Oberheims....I was more interested in girls and "proper" rock and roll.....[/quote] Heh...I was actually quite into the fusion jazz scene in the mid-70s, but it would've been pretty hard to ignore the ARP stuff anyway, given that I was a factory tech for a while. Never could afford to buy one back then, but we had a pretty nice employee studio that produced a lot pf sonic mayhem after regular working hours. Probably the the coolest thing I worked on there was building up a few [url="http://www.vintagesynth.com/arp/2500.php"]2500 panels[/url] right around the time [i]Close Encounters[/i] came out. There were only two guys in the factory who really knew how they went together, the guy who was in the movie and Al Pearlman himself. Good times...
  15. [quote name='BigGuyAtTheBack' timestamp='1420554590' post='2650557'] Hi folks, I'm just about to build the Kreuzer preamp and just wondered if anyone on the forum had done so and what they though of it. I have a BBE BMax preamp and I just can't get on with that passive tone stack! So I thought I'd have a crack at this Kreuzer preamp. Looking at the schematic it looks pretty good. Any thoughts? [/quote] Which one? He did a few different designs.
  16. [quote name='fretmeister' timestamp='1420219066' post='2646826'] I've been investigating this issue for my own use. I have discovered that the Demeter Minnie VTBP head has completely passive cooling - no fans [url="http://www.bassgear.co.uk/product/demeter-minnie-vtbp-m-800d-amp/"]http://www.bassgear....tbp-m-800d-amp/[/url][/quote] You might want to look through the Talkbass threads on that amp, thermal issues have been mentioned at least a few times. The latest pics I've seen seem to show a bigger heatsink, so hopefully it's all sorted by now. I'm really looking forward to checking one out, but it's likely to be a few months before that happens. When I built my own amp last year it was intended just for practice or very low key EUB jazz gigs. At least one very experienced engineer told me I needed to use a fan, but he also admitted to having no experience with the particular ICE module I used, which is not common in bass amps at all, and not the one Demeter uses (the one I used is bigger and more expensive, intended for pro PA duty, and requires more outboard parts). I added some heatsinking just to play it safe, and have ended up using this amp in a few fairly loud rock situations with no problems so far.
  17. [quote name='fretmeister' timestamp='1420136994' post='2646035'] Every fan is too loud if it's just bass and clarinet! Lots of space in classical music - fan noise really kills the mood. [/quote] Yep, and the same thing holds true for many of my jazz gigs without drums as well. For me, fan = no sale. Quite a few of the current crop of Class D power modules work flawlessly with just convection cooling as long as proper attention is paid to heat sink specification, but fans are cheap and small and effective heat sinks usually are not.
  18. [quote name='Jecklin' timestamp='1419944010' post='2644144'] And so it goes.... I'm on the hunt for an amplifier head again for use with my bassoon and bass guitar and it must not have a fan due to the acoustic environments I perform in. I don't need mega power - I'm still deliberating over a Phil Jones briefcase or double4 or markbass micro mark, but I think a separate head would allow me more flexibility. I know acoustic image heads don't have fans, but they are well out of my price range. Any suggestions or pointers gladly received. Also if anyone has successfully added a cut off switch to a fan in an amp I'd like to hear about that. [/quote] There are zillions of used old heavy fanless amp heads that you can get for cheap. In the US Peavey or older G-Ks would be the default suggestions. Something like a MKIII or MKIV Peavey would have two preamp channels, which might be handy in your situation?
  19. [quote name='Freddie75' timestamp='1419182781' post='2637338'] Basically I am looking to use a genz benz streamliner as a power amp and 2 different preamps for live usage. I currently have the trace v-type and am on the lookout for an ampeg svp cl. I am after a rack device which will enable me to switch between preamps for different songs etc. Worse case a pedal will do. Any recommendations??? [/quote] Radial or Lehle.
  20. [quote name='stingrayPete1977' timestamp='1419593655' post='2641078'] Ha you havent heard us murder them, they dont end up as close as described, lol. [/quote] That's cool, especially if you don't murder them exactly the same way every time.
  21. [quote name='stingrayPete1977' timestamp='1419532609' post='2640729'] I credited them in my list as its inspired by that version, there are others in there too like everything I own. I missed live and let die off and I would put Guns n Roses next to that. [/quote] Sure, perfectly reasonable and I wasn't meaning to pick at you about that. I'm old, to me "Cocaine" and "Call Me The Breeze" will always be JJ Cale tunes, "HTH" an Otis Redding song, etc. I've pretty much always been primarily into the jam band or jazz scenes, never into covers that are all that well defined by one given arrangement or performance.Vive la difference!
  22. [quote name='stingrayPete1977' timestamp='1419504838' post='2640464'] Hard to handle- Black Crowes anyone else care to share their thoughts on that lot or even their own set for riddicule? [/quote] As a geezer, it always makes me just a little sad to see that tune credited to the Black Crowes. Great song though, and oddly enough the BC arrangement is about the only version I've never played. Other than that, your set list is pretty similar to a few bands that work a lot around here. It'd be all about the vocals as far as the ceiling for gig quality. My song list? Mostly the [i]Real Book[/i], version 5. Most of my other calls these days are original soft jazzy rock/blues stuff.
  23. [quote name='zero9' timestamp='1419411207' post='2639596'] I'm sure that some EUB's sound more 'authentic' than others, to emulate an acoustic double bass. Physics dictate that an EUB designed as an electric instrument it's not going to sound like a acoustic double bass. EUB's sound differently, just as bass guitars sound differently, otherwise we might as well all play a Fender P.[/quote] Yep, and there is really no one definitive authentic upright tone to try to emulate either. I saw Charlie Mingus play unamplified in a small club, I guess that could be my bench mark. Not all of us can get away with telling the audience to sit down and shut up though...
  24. [quote name='blue' timestamp='1419191933' post='2637465'] I don't think it's just age or the music we play it's a lot of things. Some of it could be regional or cultural. Remember our BL and front person is a 29 year old female. Believe it or not she is the one against doing the more contemporary stuff. It's her band and she's be successful with this same band locally for the past 9 years. The goal was to be a good paid gig bar band and that's what we are. We have carved out a nice niche which allowed us to play 65-70 shows this year, which is more than a lot of bands that want to do paid gigs can say. So were not really looking to appeal to the under 25, nor do we care if they relate to us. They are not our target market. I'm sure when they walk in and see all the grey hair they are just like I was when I was young, [i]"let's get out of here".[/i]Our bread and butter is with a very loyal appreciative 50 + crowd.[/quote] Blue, nice to see you've found a forum that's a bit more congenial to you than that other place, and that you're still evolving musically and in projecting a sense of humor into your posts. If you really would like to go on the road, best of luck making that happen. I'd bet that blowing off the under-30 market won't be such a good strategy at that point though. What's it like for me? Massively moving playing field, with players my age dying off, retiring from music, or conversely, retiring from day jobs and having more time for music, venue ownership changing hands and doors also opening and closing for all sorts of other reasons. I took this year off from gigging and waited to see when the phone would start ringing. When it eventually did, I found myself much better at saying no to lowballs and same-olds. Right now I have two solid opportunities at doing originals enough that local venues pay good money for. I helped both acts get going years ago, moved along to better paying or more musically satisfying gigs for several years, and was very happy to find that both acts make good money now and have matured musically quite a bit. Never too late to grow up, I guess.
  25. [quote name='blue' timestamp='1418856065' post='2634224'] One of my concerns is dealing with younger musicians that have a limited knowledge in terms of rock and roll history, how it started and evolved into what it is today.[/quote] Wonder how much the younger musicians are concerned that you have never even heard Taylor Swift? Cuts both ways, no? Could just be that those under-25'ers would stick around if you played something they actually relate to -- at least that's my experience in the venues I still play in at age 61. Heck, Lady Gaga and Tony Bennett have sold a ton of units together this year. Adapt or die, the facts are indeed hard to argue.
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