Originally Posted by optofonik
Wow. What a great thread. I don't often read every post in a multipage thread, certainly not in one sitting, but I just now finished doing just that. Yesterday I replaced some bad caps in my one of my DAW's lcd monitors that had failed ($2 in caps saved me the $200 cost to buy a new one) and was inspired to dig out the two SP1s that I purchased years ago for $29.00 each and pick up where I left off researching their modification. There's so much more information available now and this thread is a treasure trove. Discovering that I can now replace the capsule in addition to the components is awesome.
I'm also hoping the Microphone-parts.com kit is listed soon. In the meantime I'm wondering about voltage ratings on these caps. I don't see any in the BOM. Also, when choosing to remove a component how do you maintain continuity, a simple wire jumper?
Thanks for the post!
When replacing caps, I usually look to match or exceed the rating of the existing part. You can calculate or look up the values from the ID number on the old cap. Just don't replace with something way lower in value. Also, I think one of the posted schemos shows values for some of the caps.
Yes, you can jumper over a removed component with a bit of wire.
I've not been updating the BOM, as I'm lucky enough to have a great local store that stocks a wide variety of parts (they didn't have the 305fet though, lol). So I haven't really had to order anything online for parts, and since I don't have easy access to a scope I can use to rebias, I've just been tinkering with the simple mods, and replacing suggested components in the circuit. I've yet to replace the fet or transistors, though I'm quite pleased with the results of the mods I've done so far. I'd actually been using the mic more than modding it recently, but I couldn't resist tinkering with it some more, and recently I screwed it up while I was working on it. Now I'm troubleshooting it instead of using it (iiiiiiiiidiot!). Too busy to do much with it at the moment.
When the mod kit is released, I'm sure we'll see some examples of it appear online. I'll certainly buy one if the price looks good. The value in a mod kit comes from the minds of folks like Jim (thanks, Jim!) who create it, then focus, clarify, and implement that design, and in the convenience of getting those exact suggested parts in one swoop from the supplier, which kicks ass. Looking forward to it.