Wayne's BA 2018 linestage

[Monk55]

Thanks RiKi!!

 

[Mod Man]

Try Tube Depot.

 

[Dennis Hui]

There are suitable replacements available, for example:

680 or 681R:
https://www.mouser.ca/ProductDetail/Vishay-Dale/CMF60680R00FKR6?qs=IIoHApDpv%2BBq%2Bdo0vP9vjQ==

RN55D6810FRE6 Vishay / Dale | Mouser Canada

270R:
https://www.mouser.ca/ProductDetail/Vishay-Dale/RN55C2700FRE6?qs=MfsjDT7L9Z/MgvdQbV3qGw==

330R:
https://www.mouser.ca/ProductDetail/Vishay-Dale/RN55C3300FB14?qs=fq2Dl5oNg0Pw26Nmq3LlTQ==

47K:
https://www.mouser.ca/ProductDetail/Vishay-Dale/RN55D4702FRE6?qs=NvUk6HKz064o1PkCcHlJNg==

 

[Monk55]

Wow. Thank you!

 

[Dennis Hui]

The trick is to look by value instead of a particular part number. Often you
can find something suitable.

 

[Monk55]

Im down to last part...EEU-FM1V221....220uf 35v...specs are hard to find like this baby.
Would the (add an L to the p/n) work? Mouser has these. Thanks for the support.

 

[mhenschel]

There's this:

Elna Capacitor 220uF 35Vdc RFS

Parts Connexion is based in Toronto, Canada so perhaps not "handy" for you.
On the other hand, their electrolytics are on sale this month. And the Silmic II caps are well regarded.

 

[Dennis Hui]

The Silmic 2 tends to be a bit larger so I suggest checking if they fit the PCBs.
Also, Mouser carries Simic 2.

I guess a safe thing is to look for a part with the same lead spacing
and diameter no larger than the original part.

 

[Monk55]

Ok...I ordered the replacement resistors (noted above) from Partconnexion...And the EEU-FM1V221L from Mouser (220uf) lead spacing is 3.5 -vs- 5mm, so a bit of finesse is required. All other parts were available from 6L6’s Mouser BOM FAF14CA149...
Many thanks to all that helped!

 

[6L6]

No part is critical on Whammy. Use whatever replacement fits. It’s still going to work perfectly.

 

[Monk55]

What is a Whammy?

 

[amandarae]

I think he meant BA2018 linestage.

 

[Monk55]

Whew...so now I’m interested..what is a Whammy?!

 

[amandarae]

Headphone Amp
WHAMMY Headphone Amplifier – diyAudio Store

 

[Monk55]

Jezz I’m green. Thanks!

 

[6L6]

Oh. This is the BA2018 thread... lol

Again, don’t worry about the passive parts. Use whatever is of proper value that you can get.

 

[wirewiggler]

We will cut you some slack, we know your office is pressurized to 8000 feet.

 

[Monk55]

I worked at Boeing for 38 years so that’s funny!

 

[rikiheck]

Parts Connexion is based in Toronto, Canada so perhaps not "handy" for you.

I am in Rhode Island and order from them all the time. Shipping is very reasonable. The stuff seems actually to be shipped from Buffalo or somewhere like that. It comes USPS.


They have an excellent selection of more 'upscale' parts, but also reasonable prices on some more basic ones. And, as you mentioned, they do sometimes run some pretty good sales.

 

[myleftear]

Does anyone know the input impedance of the line-stage?
I am considering building a ladder-type attenuator, which would be adjusted to it...