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Hey, Is it normal that I did not get any email confirmation after I paid for BitX via PayPal? It seems that the only proof that I order anything is the record on my bank account. Any person

Good looking mic. Now you just need one of them foam balls on the end of it. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/

Hi David, Looks like you have a "picky" DDS chip. Cheers, Will

Ashhar Just a few thoughts on Dexter's wire length suggestion. ? A simple manufacturing jig is one way around this, one for each Toroid?version with a different number of turns. ?In basic terms,

Yes, Replacing Q13 did fix the problem. But, many thanks for the correct Q13 type. I simply used what was on the schematic. Another great thing about this list! 73, Pat AA4PG Pat

Hi Jack et al I have already tried adding a delay to startup, I started at 200ms and went to 2sec with no success, I have already added the 2 calls to send frequency like this. ? ?

It took me half the night to get the article done, but here it is. Make your BITX40 work on 40 and 20m using QRP Labs filters and a bit of soldering. Feel free to poke holes in it, or ask any

I want one ;-) MAc sp9mrn

That would make sense. David is just unlucky in having a particularly screwed up chip when it starts. I recall a particular bit of gear at work, on one unit a particular set of plugin PCBs would

I see now, it's a new symptom description of an overloaded, or something, Q13. Right? I first read it as a question. Well... good on ya then.? But once I did hear with a receiver while the final had

I have found that the key word to use in a search for information on a particular board or component is "datasheet"; for example "AD9850 datasheet". That usually produces a much larger set of useful

Don't you enjoy the facial expression of the clerk in the plumbing department as you try to explain you are working on a microphone. I think this will do just fine. I may leave the plumbing in its

We use an AD9850 and it's been used as a straight VFO 160-10M in the Arduino Projects book, so I think it would work fine. What I suggested does not involve any hardware at all. Simply a new state

Thanks, Terry. If that's the case, we just need to add a second call to sendFrequency() in setup(). Hopefully, Dave will give that a try and let us know what happens. Jack, W8TEE To:

The gate drive is too low. I remember it being much much higher. I suspect one of the trifilar toroids has a short and this will show up if you move them. I personally saw this issue in a defective

Pat, The Q13 id actually MMBT3904, the schematic shows a different number for some reason. Farhan has explained long ago. Raj

If I may offer a suggestion (I haven't looked at the code, so you may already be doing this). When I started playing with these modules, I had one that did strange things. The cure in my case was to

Allard's solution makes it easier on the user, no need to switch in and out some BFO inductor when flipping between LSB and USB. But Allard's solution requires a VFO that can operate at either 5mhz or

You say: ?"The problem turned out to be Q13." So you replaced Q13 and now all is well? Or are you asking for help? If the IRF510 is still pulling around 100ma of idle current when transmittting,

Jerry: That sounds easy enough to do. Changing the BFO frequency involves little more than changing the BFOFREQUENCY symbolic constant that is defined at the top of the file.(I'd probably get rid of