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You are sure? I don't know, but if it is, what a problem! You can try my "manual overlay". It is located in the group files section, here:

One possible solution is terminate the filter at 200ohms and use a 4:1 balun at each end. That yeilds a 50ohm interface to the amplifiers and allows a filter at a more reasonable impedence. FYI: you

That is indeed true but in practice transistors like the 2n3904 and 2n/pn2222A easily perfom to 20+ mhz.

Preethi Nair has invited you to join hi5. By joining hi5, you will be connected to Preethi and all of Preethi's friends. hi5 is the place where friends meet. You can use hi5 for the following

I have found that a one or possibly two coats of nail polish (sometimes called nail varnish) of the clear color works well. Allison KB1GMX the coils is helpful. by sharpe part

I build for VHF so most of the PA problems have not been noted. The first model I built was fairly close to basic BITX-20 save for no power amp. I used Ferrite (FT37-43) torrids as I have them.

Ordered one and got it. Two problems: The board pattern is on the wrong side (pattern is on top not bottom.) To use it (I may not) the parts must be placed on foil side! No information on parts

Hi! All Recent Comments by Farhan on a modified BITX20 got me thinking. One of the suggestions was increasing the Rx gain. I too had encountred low gain due to poor quality devices used by me. I

Hi! To be safe, a layer of plumbers PTFE tape on balun before winding the coils is helpful. 73 Rahul VU3WJM Steve Hartley <g0fuw@...> wrote: Ashhar and freinds I have solved my

Ashhar and freinds I have solved my balun core problem. As you guessed, it was caused by sharpe edges inside the core. I small file and emery paper removed them and windings now well isolated from

Hi friends, This is my first post on the group, my compliments to farhan for bringing out the bitx, and thanks to vu3wjm for working and bringing out the pcb`s for the tcvr, with some changes in the

Hello Javed, This is discribed in the article "a simple ssb tranceiver" by Asshar Farhan. You can find that article in the Files box of this group. 73 Ruud (PE2BS) filter.

hello all friends, Please tell me how to select the crystals (10mhz)for ssb ladder filter. Thanks, Javed

digikey has them for about 5 box and sends all around the world. reading counters (256+256) comparison

I want to reply to Farhan and others about the PLL issue although this maybe a little off-topic. Two years ago I were attempting to make a "PLL in a PIC" as Farhan state starting from the Huff-Puff

this is going off-topic, so i hope to make this a last post on PICs. the frequency counting code for PICs is pretty nifty and it does the timing based on execution times of its own code and reads

As a latecomer to pics and picaxes I have managed to stumble through some of the basics, but causing a number of LEDs to come on and off is hardly exciting. I have assembled a kitset frequency

Given how cheap a PIC is, I think it's just a matter of time before we stop using standard TTL/CMOS logic, and start programming PICs as replacements. They won't be pin-for-pin replacements, but

while PLL chips are difficult to find, the 16F84 or the 16F628 are plentiful. why can't we program the PIC to behave as a PLL on it's own? the PIC timer can be used to accurately measure the

Hello fellow BITX'ers, Because I want do do some experiments with a ladderfilter on 9 MHz, I studied the amplifier stage Asshar discribed and used in his BITX20. I have some questions about it. -