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Hi, I had to use an RF gain control to tame some strong signals that caused a lot of distortion. See my post here

I have had good luck with Tayda parts (not Fets). Shipping is about the same (maybe 1$) less than Mouser. Time is a week to So. Ca. So Mouser is faster. Hard to beat Tayda on connector prices,

I've used them a lot, but not for the PA. They have a distribution warehouse in Livingston, CO, so order come fast. Their prices are good and shipping is reasonable. Jack, W8TEE To: [email protected]

Something to consider when shopping these deals from Asian suppliers is the amount of time your purchase will take to show up in your mailbox. Lately I have noticed that it has been taking longer and

No the opposite. It would take relatively more LED (less LDR Resistance) current to lower the volume because you lowered the 3.3K. The resistors in the first transistor set the gain of the feedback

Nope should have no effect on the circuit the ldr is across the volume control is in control the more light the lower the Resistance across the volume control is like turning it down I used a medium

I have a drawer full of them but have never tried them in an RF application. Vince.

Does anyone have any past experience with Tayda and IRF510s? Thanks Marco - KG5PRT

So reducing the 3.3k might increase attenuation? Is there a base resistance that is needed to protect other parts of the circuit?

I waited until I had an order for other parts, then luckily remembered the IRF510. 10 for about $6.50. My orders to Mouser (my favorite) are usually $60-70. So shipping is still 10 percent. I

That's about it in a nutshell the best led to use for the ldr is a super bright yellow I found to be best I find it a very good circuit to use

Kind of (sort of) an explanation? The LDR resistor works in conjunction with the 3.3K to lower the signal amplitude into the volume control. That is the major action! There has to be resistance up

It seems to me the best option we have at this point is (a) Somebody buy a buttload of IRF510's from Digikey/Mouser, then repack/resell to people in the communities in order to spread

See my mk 2 AGC and SIG meter driver on my part built bitx for 60m circuit top left

I take the signal for my vk3 AGC from 2x 27k ohm resistor's across the LS connections the center tap I use for audio. That resistor should be 560 ohm in the base of the 2nd bc548 I use med resistance

I put together a VK3YE AGC, and it works.? It seems to mellow out the audio a bit.? However, loud signals are still getting through.? I think that they are attenuated, but could use a bit more

I have ran my bitx 40 on 13.8v from day one nothing has gone pop yet I have never looked at the pa current left it as set in India

Jerry KE7ER wrote... I was about to order a handful of IRF510s as it appears that I am in need of a replacement. Whether I end up with fakes or real ones, they don't look too expensive to replace.

The circuit closest to the camera is the I7SWX PTT Pop Mute, the circuit to the rear is the VK3YE AGC.

Dave K8WPE wrote... I'm happy with the case that I went with. Others on the list have used it. See attached photo from before I started drilling and the nearly finished and working radio... from