Quickie mods

[charger]

does it really worth to change the stock pot with an Alps 100K  , does it emprove sound?

thank you

[Zimmer64]

The alps pot fixed my channel inbalance and improved the sound quality for me. Defenately recommend.

[charger]

Thank you I will try

[Wanderer]

My recommendation would be the Sennheiser HD600s. If you want something cheaper, look for a used pair of Sennheiser HD580s or AKG 240Ms.

I use AKG 240M with a Speco'ed Quickie.

I think it sounds quite nice BUT - do a search on wiring the Specos for the 600 ohm AKG 240M. Changing the wiring per PJ recommendations gave me just a jot more gain. While the AKGs go loud enough for me they might not please a headbanger. Not the most sensitive 'phones. Qucikie needs the choke mod or PJCCS for acceptable gain.

The specos I have, the older orignal style, do result in a bass roll off below circa 50 hz and pretty much NO bass below 40 hz.  Sounds great with most jazz and pre-1820s classical but takes some of the guts out of big orchestra Mahler or Saint-Sa

[charger]

what about blue tack for dumping tubes?  no one tried that?

and another question , i read it's possible to replace electrolitic capacitor with film capacitor in the Q , which capacitor is it ?

[charger]

which resistor is better to replace with tantallium ?  the 1K close to the 150 uf capacitor or the ones 475K close to the coupling capacitors ?

thanx

[Paul Birkeland]

which resistor is better to replace with tantallium ?  the 1K close to the 150 uf capacitor or the ones 475K close to the coupling capacitors

Neither.  The 4K plate loads would be well substituted by Tantalum resistors, or the 4K resistors on the PJCCS.

[charger]

so if i understand right , is good to change only the 4k resistor?  where is this 4K resistor?

[Paul Birkeland]

so if i understand right , is good to change only the 4k resistor?  where is this 4K resistor?

Consult the manual.

[charger]

I am just in a  mess now !! which manual ?  Quickie manual or PJCCS  ?  where  is this 4K resistor?

[Paul Birkeland]

I am just in a  mess now !! which manual ?  Quickie manual or PJCCS  ?  where  is this 4K resistor?

The 4K resistor is in both. In the PJCCS manual, it is removed, and replaced with a constant current source that also uses a 4K resistor.

[charger]

really strange i don't remind a 4K resistor in the quickie anyway I will check it out

[charger]

so i put 27 pf from pin3 to 5 and 56 pf from pin 5 to ground as suggested by Paul but noise from mobile is still here
but i found basses are more punchy and dynamic , I don't know it's a placebo effect but it seems so

[charger]

after some hour of listening i can confirm sound has improved in all parameters, i don't know why but it's another sound i hear, everithing is more alive , sounds i never heard before in cds now are very audibles . May be Paul has an explanation for this

[Paul Joppa]

... May be Paul has an explanation for this

No clue!