Archive for Loudspeakers

Another Tannoy K3809 adventure (read – revitalization , again ) ….. Part 2.

Continuo from previous post .

 

First thing was to sand Pepperpot throats , clean them and magnets with compressed air , degrease throats with nitro-solvent and put some paper skirt , prior to spraying . I chose Graphite Black Kenda spray paint .

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Another Tannoy K3809 adventure (read – revitalization , again ) …..

It started due to adventurous spirit of Ninja ( as known on Baby DiyA ) – he found them somewhere on web adds , I believe in Denmark .

As he said – “I don’t know do I need them , but somebody will “ ; due to fact that one is reported as having de-centred bass cone , they were pretty decent price-wise .

Pretty benign pictures , sent to Ninja from seller ; half-luck – just one is having K3809 type sticker , but both are no-back-ribs …… we were hoping in that moment that no-name one is not K3805 (higher Fs , used in Puma cabs) :

 

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Semi finished Tannoy Open Baffle xover

Started as shown here , what was pretty much generic/common Tannoy xover, for Pepperpot WG equipped units.

Now semi finished , still no measurements , only by ear and plenty of deduction , based on numerous web sources . However , it sounds like right step from original values , even still pretty much in Tannoy concept.

One day , hopefully soon , they’ll be finished in principle . Then making no hold barrels version , with ~ 3,8kg of copper for bass and tweet chokes ; maybe even DIY graphite rod resistors 😉 .

Beyma (bass helper) 9.2mH will stay as is – ancient EI core choke , 0.2Rdc .

Still to try air-core (so – no core) autoformer choke for Squawker , hoping that additional 1.5db will bring even more liveliness  .

No pics , just schematic .

xover May-2014

 

The Tannoy Story by Julian Alderton

It’s here !

My personal copy , after years of trying to buy it for sane amount of greenies ;

You can still find it ….. in at least dozen web book stores , but just as another book available only in Catalog , not in reality .

Here and there they’re popping up on Ama*on or E*ay , for anything between 30 and 350E , but you need either to be extremely quick or extremely dumb or both , to snatch it.

 

However , lucky and unworthy as I am , after several years of bawling , I got it … thanks to my own personal Wakoo German , known as Generg on Big Diya .

 

So , again , another Geschenk von Generg ……..

Vielen Dank , Herr Bethge !

After few quick glances , it seems as interesting reading ; 260+ pages in pretty small font, few dozens of pictures …… and tonight it will be just first of many nice reading nights …….

😉

 

Tannoy story

265-back

 Edit few days later …….. finished very enjoyable reading ……

 What a ride !

Big Tannoy Open Baffle fun …… playing with test xover

Continuo from here ;

Still without measurements , just playing with data from various web sources , LTSpice and bunch of parts