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Sounds interesting for prototyping. Most of my designs make use of TQFP and LQFP packages with 0.5mm pin pitch; can the process and equipment you're using handle those? Which engraver are you using?

Hey wait, weren't you the guy who was just complaining that nobody does anything anymore? ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA

I stopped doing it years ago mainly because the materials I mostly use ( Rogers 4350,6010) are not available with photo resist coating and if you send them out for coating than the lot charge is quite

I've started "etching" PCBs with a fiber laser engraver. The bog standard 1064 nm ones can do it, which somewhat surprised me. Glad to not have to coat PCBs in photosensitive goo anymore since the

Eventually dad bought a etch tank from isel , it used a different cchemical (ammonia persulphate ) and the agitation was done by the means of air bubbles generated by a airpump ! The problem with

I grew up just fine ? Sent: Friday, March 18, 2022 7:00 PM To: [email protected] Subject: Re: BS, was Re: [HP-Agilent-Keysight-equipment] Spread the word -- Swap Meet Returns!

Actually eventually I switched to ammonia persulphate , cheaper no smell and less stress with mom over holes in shirts ?

If you can get it, I'd suggest the CuCl method, about 4 parts Hydrogen peroxide (drugstore strength) and 1 part of Hydrochloric (muriatic) acid.? It'll need air bubbling through it as the hydrogen

If there is general consensus from members I could put a video out about it. Also the EEVblog is a good place and very active. But Will is correct there will be lots of power supply repair questions.

That's something I had never considered, but, so long as the list doesn't mind some occasional naive questions, part of the role of their HS capstones is professional development, and introducing them

Truly dangerous. Get a stain on the stove and you're toast!

I still etch with ferric chloride here at the house. But I do use an earth sciences Hot shaker table with a water bath rather than food prep area. So at least some improvement. Zen

Well I was thinking of separating the operational status of the doubler filter from the logic / control / RF drive component. It is difficult to diagnose one without knowing whether the other is

Oh lord , I remember me and dad etching circuit boards using ferric chloride solution on the kitchen stove

Ok before jumping to conclusions and re-engineering how about figuring out what’s really wrong with it ? If you talk about removing and rewiring you might as well get a control board from a 8517A

Can he pull the 40GHz section (filter, doubler, relay, etc) out of the 8516, and use DC levels to control it while driving it with the 8340 That way he could eliminate the doubler/filter as the root

Ah, sorta. I've been living in that same digital age, but never did the nickname thing. We don't have rigid rules here, but this is a mailing list of mostly professional types, so we do prefer the use

Dave, Zen is one of my names I guess. Living in the digital age you seem to collect things like names. I have gone by Zenwizard on line for going on 25 years now. For off line use I am an Eric,

Bob’s wife obviously remembered that his life insurance policy had lapsed… Sent from Yahoo Mail for iPad

" *Once folks have an opportunity to cheaply develop a real interest, TinySA and NanoVNA will not be enough ( definatly true )" Not to sound too blasphemic, but I wager most folks, including some "far