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the value seens to be 2.2M of course i am not following the discussion much and am ignorant of its value regards Sarma qrpbuilder@...> wrote:

The photo you show is one method that cost me only $0.08, since the 1% metal film resistors are $0.02 each with free shipping. chuck, k7qo

This is exactly the same resistor network as the one specified in the BOM but contains one extra resistor, so has 10 pins instead of 8. Costs $0.42 each. Snip off two of the pins on one end and mount

Gang: Ordered 11/24/2017 from ALLPCB for $5.49 Shipped 11/27/2017 Delivered 11/29/2017 to 78628-1520 FYI Larry KA5T

Somebody posted a report recently on this group about matching a batch of CTS crystals from Mouser. The frequency spread across the entire batch of 100 crystals was a mere 110 Hz, which is not enough

Farhan used the same trimmer in the analogue vfo version of the BITX40. If you changed the fixed capacitors for good NP0, it was quite good but in my opinion the inductor stability is much more

Dick Palmer, WB6JDH, and I rat around together in SoCal. Well, I pretty much head up to his digs in Whittier and he opens the magic gates of electronic and radio theory and practice for me. After, we

One more data point. The entire batch of 100 crystals all measured within 110 Hz. -- 72 - John - N0HJ

Thanks Chuck! Yes, the caps in the filter should be matched, and if varactors are used those should be matched too for perfection. My question is how much perfection do we need practically if we are

I just finished my matching of qty 100 4.9152 MHz CTS crystals purchased from Mouser. I measured the entire set compared to a 48 hour warmed 5328A counter timebase (1 Hz resolution on the digits) and

I want to do a transformer with a tuned secondary and link primary. I have a coil somewhere that is wound with quite a few turns of magnet wire and a primary of three turns of 12g wire. I made one

There is some information about these in the ARRL Handbooks - at least the older ones. Sweep alignments seem like they should be easier now than they were 30 or 40 years ago for most of us. 73, Bill

Hi! Glen and others, I did some experimentation lately with this configuration based on work of OM Rolf DL6ZB and OM Tasa YU1LM here: SSB Exciter with IF-Clipper | | | | SSB Exciter with IF-Clipper |

Mike, You can get a better display of the filter’s passband by using a lower resolution bandwidth on your spectrum analyzer. Think about it - you’re measuring a 500 Hz wide filter with the

Are you doing an L-match or a parallel resonant circuit with a 50 ohm tap or secondary on the coil? I'd think with an L-match, you're pretty much constrained by the frequency and specified load

Gang, With all the crystal matching going on, I can imagine lineups of many crystals: one end being "low", the other end being "high" in frequency. The middle group will be missing, and found buried

Thanks Doug , I was aiming at similar choosing 12MHz frequency. 4.096 is a good choice i suppose, being a 2^x. Thanks again regards sarma vu3zmv regards Sarma ki6ds13@...> wrote:

b.? The term 1N400X means 1N4001, 1N4002, 1N4003, 1N4004, ... I'm dumbfounded that someone spent a lot of time actually searching for a part number 1N400X.? We all use the term 1N400X in hopes that

Mike, That is beautiful work and it is greatly appreciated.? I think that your ears can hear the difference.? To me it is the background noise floor outside the pass band of the filter.? See how

Gang, I get emails and I answer them on an individual basis and from time to time I post where I think some people may need some help. A long long time ago I wrote an article for QQ on an introduction