soliciting input re: resistor brands for my first Marshall build

[bepone]

for Marshall metal film and polypropilenes should be avoided because result is awful .. been there... recipe is carbon film + polyester

[bepone]

it is possible to change few components without major change in the sound, because all together it counts..there are many compoents in the group at the end.. so if something is missing regular carbon film will be ok (modern cheap SR Passives or TE )

ofcourse 1-2W not less

[bepone]

Metroamp also added few metal oxide resistors 3W in their version, maybe for a reason

[WhopperPlate]

for Marshall metal film and polypropilenes should be avoided because result is awful .. been there... recipe is carbon film + polyester

There he is, the guy I warned you all about ! Do not listen to him !

[Roe]

Metroamp also added few metal oxide resistors 3W in their version, maybe for a reason

they used 2w MOs for voltage dropping in the power supply. but the MOs do not sound as good as CF or CC here

[WhopperPlate]

Metroamp also added few metal oxide resistors 3W in their version, maybe for a reason

they used 2w MOs for voltage dropping in the power supply. but the MOs do not sound as good as CF or CC here

Nonsense , lies I tell you ! Mox are reliably superior in all aspects ! I rebuke you cork sniffers !

[bepone]

Metroamp also added few metal oxide resistors 3W in their version, maybe for a reason

they used 2w MOs for voltage dropping in the power supply. but the MOs do not sound as good as CF or CC here

in signal: cathodes 2. stage , 820R and 100k and NFB MOX

[bepone]

for Marshall metal film and polypropilenes should be avoided because result is awful .. been there... recipe is carbon film + polyester

There he is, the guy I warned you all about ! Do not listen to him !

never

[zephyrblau]

Can't help you with making up your mind, but that (5E9A?) board above your 50W chassis is pretty sweet

thanks for the kind words. greatly appreciated.
yep... 5E9... my first tweed amp. purchased mid-80s. I had *no* idea what I was looking at but Glen Quan was more than happy to keep the information to himself and take my $$$
my attempt at turning it back to some semblance of it's original condition. thanks to members here I've rounded up dead Astron 'lytics for re-stuffing. a couple of the yellow boys came from here but, most were from a long, patient and expensive search.
the subject for another thread as I get closer to finishing it up.
thanks again

[Matthews Guitars]

With respect to other opinions, I offer my own.

Two components having the SAME primary value (resistance for resistors, capacitance for capacitors, inductance for inductors) and not having significantly different secondary values (such as ESR for capacitors) are going to be the same in circuit and you can do any number of and type of frequency response plots, bode plots, selective frequency analysis, whatever, to prove it academically, with test equipment that IS far more sensitive, precise, accurate, and repeatable than human senses.

I allow for the possibility that secondary values can affect a component's performance enough to make a measurable, and possibly audible, difference. It is no surprise that wirewound resistors will have a significant inductance. High vs. low ESR capacitor types can have relatively different frequency response curves given identical capacitance values.

But if they measure the same, in both primary and secondary values, they ARE the same. You will measure no difference, and you will hear no difference.

I don't believe in magic, mythology, or miracles. Science is where all answers may be found. Show me a miracle and I'll show you an event powered by technology unknown to the witnesses of it.

[bepone]

Nothing new. Every component has RLC part inside.. so R is not R, L is not L, C is not C..

There is a big difference in resistors.. but no need to go in science too much... it is enough to know where to put non-inductive resistor to avoid strange phenomena.. some acting like antenna..some resistors adding warmth, some adding coldness and sharpness..some reducing noise.. some adding noise.. and so on.

[bepone]

Agreed in building that it is more important to select good output transformer because effect on the tone is way higher than from resistors.. But somewhere change on resistor on V1 tube (restoring old amp) can completely ruin the tone of the amp.

[martin manning]

With respect to other opinions, I offer my own.

Two components having the SAME primary value (resistance for resistors, capacitance for capacitors, inductance for inductors) and not having significantly different secondary values (such as ESR for capacitors) are going to be the same in circuit and you can do any number of and type of frequency response plots, bode plots, selective frequency analysis, whatever, to prove it academically, with test equipment that IS far more sensitive, precise, accurate, and repeatable than human senses.

I allow for the possibility that secondary values can affect a component's performance enough to make a measurable, and possibly audible, difference. It is no surprise that wirewound resistors will have a significant inductance. High vs. low ESR capacitor types can have relatively different frequency response curves given identical capacitance values.

Different capacitor dielectrics have different and frequency-dependent temperature coefficients, and some produce measurable distortion, so there is more to them than parasitic R and L.

MF and CF resistor parasitics are negligible at audio frequencies, and it's easy to measure these parameters. They will have a couple of tenths of a pF in parallel capacitance, and a few mH of series inductance. The leads and hookup wire add more parasitic L and C than the component itself. Wirewound types generally have a relatively small inductance due to their construction.

Different types produce more or less noise. This is a different phenomenon, which can contribute to sound quality.

But if they measure the same, in both primary and secondary values, they ARE the same. You will measure no difference, and you will hear no difference.

This is not quite true. You can play the same clip twice for some people, and they will claim they hear a difference.

Consider the above comments a PSA ;^)

[Matthews Guitars]

Properly selected and used, test equipment is far more sensitive, precise, accurate, and repeatable than human hearing. If people claim they hear a difference between A and B and the test setup denies such a difference exists, and is being used properly within its parameters to test for something that IS within its parameters, then I'm going to trust the unbiased test system, and not human perception which is biased, prejudiced, and is affected by various uncontrollable factors.

[bepone]

for what someone in resitors swapping/ checkout need "test equipment"??