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Hello Fello wBuilders, think I stuffed up a previous message post - anyway, have posted a photo of my humble efforts at kitchen sink PCB making for the BITX20 IF Amp - its in the VK3BFA folder. Any

Both those circuits will work fine, as will most any other QRP amp circuit. A broadbanded circuit is easier to build and use because it requires no tune-up and is less likely to have a parasitic

The only reason(s) I can think of _not_ to make 'em float in the air is that this technique has the potential to make the circuit sensitive to microphonics. And in a high-vibration or high-shock

What is a "delta" tap washer? I'd be careful... When I bought my tap washers there were "delta" washers and ordinary ones. But I don't recall what the difference was. Anyone know? I got my

Hi all, I had the intention to build this transceiver when a friend of me brought this Yahoo group under my attention. Too bad, now I spend all the time on reading all information instead of

Hi according to my diagram +V should be on pin 6 as mentioned .. looks like pins 5 and 6 need to be changed for each other as output must be on 5 and volts in on 6 Charles G4VSZ

Hi all. I have posted a pic, I hope in the photos section. This is my first attempt at using Press & Peel to create PCB's as I usually use the island method etc for my projects. I was so impressed

Anyone checked this - is +V on pin 5 correct? Should it not be on pin 6? Mark.

mark, check the corrected schematic on http://www.phonestack.com/farhan. the earlier circuit had a typo. - farhan

Dear forum, The IRF510 and 2N2218 is not available here in INDONESIA, -Could you suggest an alternative for 'linear amplifier module' ? -Can I just use: HF BANDS QRP LINEAR AMPLIFIER - 4WATT or TEN

Hi All, Actually, I think that the Manhattan in the QRP construction method really refers to the use of straight wires on a 90 degree grid. At least that is where the term originated. Typical

Mark & Hans, Many thanks for your replies. Small rectangular pads should work just fine, and those I can come up with - I don't know why it didn't occur to me. Thanks for your help, Bruce/nd8i

Many thanks Hans - my set of components arrived today! Payment was sent straight away by first class post. Keep up the excellent work! Duncan G4DFV

Mark, Bruce et al I don't think the difference between "ugly" and "Manhatten" methods is all that much. My method is a bit of a hybrid I suppose. Mostly ugly. But if I find a point needs to be

Bruce I bought a "Copper island Construction Kit" but they ceased trading a while ago, I found someone (and I can't remember who or find the e-mails) that sent me some replacement (re-stock) pads via

I've been using ugly-style construction, which has worked quite well. I've noticed a bunch of constructors have used Manhattan- style construction. Not being willing to leave well enough alone, I

It's definitely possible, I am a member of another group where the members do post pictures to the photos folder, and don't have to be administrator. Have a look at the folders on the group home

Hi! Has anyone attempted to list all BITX20 components? I haven't found any link on Ashan's page. Here is my attempt at listing all components, except for the IRF510 PA (had no time). Please warn me

G'day Troops, I note that one or two contributors have mentioned attachments (which do not appear). At the same time there are some photographs which CAN be accessed. Being a Bear of Very Little

Help please... I'm new to this forum thing, so I have to ask "How does one go about posting a schematic or picture of BITX related info"? I sent an attached file with one of my posts and now my email