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Mini Karlsonator (0.53X) with Dual TC9FD's
Mini Karlsonator (0.53X) with Dual TC9FD's
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Old 15th April 2018, 08:28 AM   #2741
davetest is offline davetest
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Originally Posted by freddi View Post
$55.04 buys Eight shipped - there's a coupon in theory to further reduce the price by 15% but could not find a place to enter it in the test of the checkout - perhaps after the payment info is entered (?)

btw - the full size Karlsonator ("Karlsonator12" by GregB) works well with 12lta, and should work with a number of 12 and 10 drivers. Fb on mine measures ~37Hz so keep that in mind.
Hi Freddi. Are you able to share your coupon code please? I would love to give it a go.
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Old 15th April 2018, 09:51 AM   #2742
Ian J is offline Ian J  United Kingdom
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Originally Posted by xrk971 View Post
Freddi just ran across what appears to be the spittin’ image of a Dayton PA130-8 from MCM for $8ea. This would be very useful in a Karlsonator loaded with four in series parallel. I think it would be about a full size 1.0x Karlsonator with 97dB sensitivity at 8ohms and 2.83v.

http://www.newark.com/mcm-audio-sele...ker/dp/11C1076
Available from UK site too! Though as they are shipping from US there is a £16 charge. Can get 4 for ~£42 delivered
http://uk.farnell.com/mcm-audio-sele...ieCreated=true
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Old 15th April 2018, 02:40 PM   #2743
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
I just ordered 8 for $58 shipping included. There were 113 in stock before I ordered so get them while they last.

I hope the T/S params pan out to be close to PA130-8. The magnet looks substantial so should be ok. A four driver K'nator 12 with the highs of a 5in and 97dB sensitivity would be very cool indeed.
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Old 15th April 2018, 06:31 PM   #2744
Lingwendil is offline Lingwendil  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
105 left in stock now

Good call. I ordered six, along with a dozen each IRFP9240 and IRFP240 for a pass F4 build can't beat the price, especially once you hit $49 for free shipping.

She Who Mothers my Kids has asked me (just last night) to build a pair of K's for her sister, and a little tube amp to match, so the price is definitely right.
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Old 15th April 2018, 07:15 PM   #2745
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
You are going to need a Preamp for that F4.
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Old 15th April 2018, 07:21 PM   #2746
Lingwendil is offline Lingwendil  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
That's why I decided to build the F4, as an excuse to build multiple preamp designs. The current plan is a tube based gain stage based around the Russian subminiature 6N16B, another with the 6SN7, and maybe even going for a dual mono/balanced input config, with my own version of Sy's Impasse amplifier. Easy enough to put a gain of 15~20x together simply with a ton of good designs.

You see, choosing the right projects specifically to justify further/future projects is the way to go
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Old 16th April 2018, 01:13 AM   #2747
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Quote:
Originally Posted by Lingwendil View Post
That's why I decided to build the F4, as an excuse to build multiple preamp designs. The current plan is a tube based gain stage based around the Russian subminiature 6N16B, another with the 6SN7, and maybe even going for a dual mono/balanced input config, with my own version of Sy's Impasse amplifier. Easy enough to put a gain of 15~20x together simply with a ton of good designs.

You see, choosing the right projects specifically to justify further/future projects is the way to go
You might want to look into a Preamp I made with AKSA specifically to drive the F4. You need an amp capable of 40vpp to get 25wrms into 8ohms. And to do that on a F4 requires a preamp that can get 40vpp with low noise and low distortion, and have a nice harmonic profile similar to SET - not crazy odd order harmonics up to H9 at max power. Real simple 5 actives nothing unobtanium.

Design here:
AKSA's Lender Preamp with 40Vpp Output

GB here:
AKSA's Lender Preamp with 40Vpp Ouput GB
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Last edited by xrk971; 16th April 2018 at 01:16 AM.
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Old 16th April 2018, 07:30 AM   #2748
davetest is offline davetest
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Quote:
Originally Posted by xrk971 View Post
Freddi just ran across what appears to be the spittin’ image of a Dayton PA130-8 from MCM for $8ea. This would be very useful in a Karlsonator loaded with four in series parallel. I think it would be about a full size 1.0x Karlsonator with 97dB sensitivity at 8ohms and 2.83v.

http://www.newark.com/mcm-audio-sele...ker/dp/11C1076
Hi X. Could a single one of these drivers work for a smaller K? What size enclosure do you think I might try. I intend to buy 8 for a big pair, but wondered if it would be fun to try a couple of single driver units allong the way.
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Old 16th April 2018, 11:58 AM   #2749
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
A single PA130-8 works beautifully in a 0.53x K’nator. One of my favorite speakers of all time. Keep in mind these are MCM made and probably similar to PA130-8 but no guarantees until I get one and measure it. But price is so low at $6 ea when buying 8 it’s almost a no brainer.
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Old 16th April 2018, 02:08 PM   #2750
freddi is offline freddi  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
here's a really beat MCM 5 over 10 years old in a paper mache reflex cabinet with no damping material vs a little Karlsonator. The "Eyes" on the head were the ports

http://i.imgur.com/gBsaHMu.gif
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