#b15n

[mmguitarbar]

Portaflex Party! One owner early 1961 B-15N with "random flair" covering and a minty mid '60s SB-12. Inca Silver Jazz Bass from Fender Japan front and center. #ampeg #portaflex #ampegfliptop #B15N #Fender #Jazzbass #Incasilver #Fenderjapan (at Mike & Mike's Guitar Bar)

[groovesmith]

#ampeg #B15N #portaflex #vintage #bass #tone #studio #recording #1962 #limefieldstudios @ampeg (at Manchester, United Kingdom)

[hopetownsound]

Ha! This is amazing! UA licenses all their @ampeg sims from @brainworxaudio so with the @pluginalliance subscription, we’re getting them native and directly from the source! I was just LOVING using their B15N plugin on a mix yesterday! Btw, we still have our real, mint #b15n too :) Great stuff! #bass #bassist #bassplayer #recording #recordingstudio #producer #musicproducer #mixing #musicproduction #doylestown #buckscounty (at Hopetown Sound) https://www.instagram.com/p/B1EIoqbjCVe/?igshid=tnolnlnky050

[hopetownsound]

#reamp #bass with out #vintage @ampeg #b15n and @hartkesystems #bassplayer #bassist #recording #recordingstudio #phillymusic #producer #buckscounty (at Hopetown Sound) https://www.instagram.com/p/BrIvIdLjyfw/?utm_source=ig_tumblr_share&igshid=1id2i7ig34a88

[dwbguitars]

#ampeg #b15n #1966 #bassamp (at dwb Guitars)

[irfrench]

B15-ECL

Me again...

As per the usual caveats - apologies for the playing (was in a rush), apologies for the limited material choice (in a rush), the mic placement (in a rush)... you get the idea.

Hopefully the video will be more use than not - it was my first attempt at recording video with decent audio (camera doesn't have ext. mic input) and using a video editor to cut down 30mins of useless footage down to only 8ish mins of useless footage!  

x

[irfrench]

Quick update

I said I'd do a quick demo - and here it is.

Only a little post processing (limited to bring up volume).

First a typical sound - then one dirty.

With a bit more time I think I could do with allowing a bit more NF to occur to allow a wider range of clean-ish sounds...

KEEP FAFFING!

x

[irfrench]

TWEAKZ

So the sound samples didn't happen - I've been uber busy at work (I work from home most days, hence possibly squeezing in) and I didn't get chance.  I WILL do it though! :)

I also got chance to faff with some negative feedback... So the idea is to put some of the output back into the amp at an earlier stage - read HERE for info - the main purpose of this for me was to reduce distortion a little.  I had a spare 10k resistor and whacked it in.

SQQEEEEEEEEEEEEEEEEEEAAAALLLLLL

OK, I didn't luck out.  The negative feedback is only negative if it is out of phase with the original.  As it was wired it was a positive feedback loop so it was generating its own signal.  'Helpfully' I always keep my wiring quite tidy/tight so I had to reverse the secondary leads instead of the primary.

Much better - AND a much more usable range of gain.  Sweet.  I then thought I'd better do it properly and try a pot there.  I stuck a resistor in series (to maintain a minimum resistance/maximum level of feedback) with a 100k pot to see what varying it does (using the helpfully placed legacy IEC hole!):

After much faffing I found a spot I liked, disconnected the leads (with the amp off) and measured the resistance - 11k - so I whacked the 10k back in... happy days!

I've done some calcs too, it looks like the B+ is a little low (at about 200v - I was aiming for 220v) and the ECL82 dissipation is at about 4.6w.

As mentioned before - this is NOT a loud bass amp.  If you're sticking a mic on the amp for recording, or just practising at home it'll be fine.  Gigging? NO WAY.

Just thought I'd mention that again! :)

x