27 resistors = $69

[lastwinj]

for the upcoming test/shootout, i splurged a bit. check it out.

PRP metal film
[img:787:375]http://i53.photobucket.com/albums/g66/l ... cey006.jpg[/img]
shinkoh and Audionote Tantalum film
[img:795:261]http://i53.photobucket.com/albums/g66/l ... cey007.jpg[/img]
Riken ohm 1/2w and 1w
[img359]http://i53.photobucket.com/albums/g66/l ... cey008.jpg[/img]

may get some bulk foil and some Caddock mk632, but we shall see. would run about 80 for 16 resistors (i have a few in stock). YIKES!!!!

germ

[rfgordon]

Very nice selection. I like the PRPs used with a few 100 ohm CCs in strategic spots in the signal flow. I guess you figured out you swapped the Riken & tant pics...

What, no Kiwames?

[Bob-I]

IMHE the biggest difference is on plate load resistors. I'm looking forward to this test!!

[mlp-mx6]

IMHE the biggest difference is on plate load resistors. I'm looking forward to this test!!

Y'know, I've always wondered about this, but have not made the time to do any experiments - not to mention that (at this point) I would be relying on aural memory, lacking a good recording setup.

Nevertheless, what I've wondered is if the cathode resistors are also important. This makes sense to me, as the same current swings that go through the plate resistor also have to go through the cathode resistor and cathode cap combination. Perhaps the AC component that goes through the cap makes this resistor less important - but I would like to prove this to myself.

Also - am I remembering properly that Omar mentioned that he put the RN65 plate resistors in a Wreck build and LOVED the result? Has anyone else tried these resistors in that circuit?

I will add that I built one amp - a 6V6-driven 5F6-A type circuit where I used pricey Auricaps throughout. It's a subtle difference, but that amp does have a sweetness to it that I haven't found in other builds I've done. Meat with clarity, if that makes any sense. Anyone else tried boutique caps? Like the Allessandro's, or MusiCaps?

[paulster]

Looking forward to this too. I've used PRPs before and liked them a lot, but have been favouring Kiwames of late because there is next to no noise with them and they are nice and warm sounding. It depends on what I'm working on at the time. Now if only they did a 2W 1M resistor rather than those huge 5W things you have to cram into the PI!

Looking forward to your observations on the differences.

Where do you source your PRPs from, by the way? West Labs does them but has an annoyingly limited choice of values for the GP1 range.

[rfgordon]

The first batch of PRPs I got as a sample set from the manufacturer. Very nice folks. Otherwise, I get them from www.soniccraft.com. Don't know if other folks have other sources.

I, too, like the Kiwames, particularly my a jazz amp, where I also use 68k Rikens on the input jack for their particular character. Too many Rikens gets a bit too buttery on the top end, IMO.

One of these days I plan to try the Little Demon CCs...anybody try them?

As for caps, I use Auricaps in a few spots sometimes, like first coupling cap in a jazz amp. And I like the the NOS STK MPPs from Turretboards. Very nice on the PI or to join parallel sides of a 12AX7.

I haven't tried the new Vitaman Ts from Mojo.

Also, Ken's (turretboards.com) NOS styrene 560 pF caps are monster smooth on the tone stack. Just swapping the usual silver mica for a styrene can change the tone big time.

[Bob-I]

IMHE the biggest difference is on plate load resistors. I'm looking forward to this test!!

Nevertheless, what I've wondered is if the cathode resistors are also important. This makes sense to me, as the same current swings that go through the plate resistor also have to go through the cathode resistor and cathode cap combination. Perhaps the AC component that goes through the cap makes this resistor less important - but I would like to prove this to myself.

Again I'll be interested in your results, but IME the Rk doesn't have dramatic tone change that Rp does. I'm thinking it's because we don't take the output from this resistor and therefore the frequency response is not as important. Just a guess on my part.

Also - am I remembering properly that Omar mentioned that he put the RN65 plate resistors in a Wreck build and LOVED the result? Has anyone else tried these resistors in that circuit?

Yes!!! All the time. For Dumble like amps this is a critical component. The highs are more pronounced and smoother, plus the overtones are more present using these resistors. It's really hard to describe but when dogears suggested these to me the results were simply outstanding.

I will add that I built one amp - a 6V6-driven 5F6-A type circuit where I used pricey Auricaps throughout. It's a subtle difference, but that amp does have a sweetness to it that I haven't found in other builds I've done. Meat with clarity, if that makes any sense. Anyone else tried boutique caps? Like the Allessandro's, or MusiCaps?

I've tried many types of caps but not these pricy ones. Maybe someday when I have an extra few hundred burning a hole in my pocket

[lastwinj]

Where do you source your PRPs from, by the way? West Labs does them but has an annoyingly limited choice of values for the GP1 range.

parts connexion but sonic craft carries em too. i had to order from parts connexion to get the tants and riken, at a somewhat decent price. also percy audio is replacing his resista with PRP.

germ

[lastwinj]

Also, Ken's (turretboards.com) NOS styrene 560 pF caps are monster smooth on the tone stack. Just swapping the usual silver mica for a styrene can change the tone big time.

have you tried my wima 470pf 400v polycarbonates? pm me.

germ

[lastwinj]

well, i have about 20 types of resistors, and 20 types of capacitor to try out. should be good fun. will have to use a PCB with phoenix contact terminal blocks for ease of insertion, but i should get a relatively decent result.

all manner and brand of metal films, carbon film, bulk foil, carbon comp, polyester, polypropylene, polycarbonate, polyphenyl sulfide, teflon, metallized, box, axial, radial, u name it.

will be good fun.

should be able to burn in the caps within the next few weeks. going to burn them all in for approximately 100hours.


germ

[dehughes]

Also, Ken's (turretboards.com) NOS styrene 560 pF caps are monster smooth on the tone stack. Just swapping the usual silver mica for a styrene can change the tone big time.

AGREED. In the top boost side of my AC30-ish creation I like them (500pf, actually...) A LOT more than silver micas.

[lastwinj]

anybody have some caps they wanna donate? or resistors? still short on 1/2w, 1w and 2w CC. all i have are 100k 1w and 2w. values needed are:

1.5k x 3
47k x 2
470 x 1
1m x 1

caps needed are 3 x .022uf, minimum of 250v. tested pretty close, if possible.

in capacitors I have:

3 types of wima (mks3, fkp-1, mkp10)
xicon mpp
mallory 160
vishay mkp1840
cornell DME
vishay 715p
sbe 716p
sbe 6ps
vishay 225p
mallory PVC
mallory 150
sozo
polystyrene
stk kp80s
erie ceramic
ero/vishay mkt1813
itw film foil polypropylene
electrocube met polycarbonate
russian PIO
russian teflon


in resistors i have:

koa speer 1/2w metal film
xicon 1/2w metal film
1w metal film
2w metal film
vishay dale rn60
vishay dale rn65
vishay dale ccf60
xicon 1w carbon film
russian 1/2w metal film
vishay bc components 2w power metal film
xicon 1w metal oxide
corning 1/2w metal film
shinkoh & audionote tantalum film 1/2w
PRP metal film 1w
Riken ohm 1/2w carbon film
vishay bulk foil rnc90y and s105d (working on these, super expensive)

contact me.

germ

[brownnote]

anybody have some caps they wanna donate? or resistors? still short on 1/2w, 1w and 2w CC. all i have are 100k 1w and 2w. values needed are:

1.5k x 3
47k x 2
470 x 1
1m x 1

I can help there...I think I have all those values in .5w & 1w maybe some in 2w.

[jelle]

Please email me on jwelagen (at) hotmail.com. I have the 2 or 3 watt resistors here in front of me!

Jelle

NY

[Ed de Jager]

I have 3x0.022@250V Phillips Mustard.And am over here eddejager@chello.nl