开云体育

From: Tony Parks <kb9yig@...>
Date: July 17, 2021 at 6:37:50 AM EDT
To: Alan G4ZFQ <alan4alan@...>
Subject: Re: [softrock40] LCR recommendations?

Good Morning Alan and others,

I appreciate the thoughtful comments from you and the group. Each day when I am having fun with the Softrock kits I think that it is the Softrock users that have contributed so generously to my enjoyment. Thanks to all !!!

A little more information:

Used multiple irons for about six years until the local Radio Shack stores closed up:

15W 120 VAC, ~956 ohm (cold), CAT. NO. 64-2951B, MFD TAWAN

Also used Radio Shack solder, 0.015 inch diameter, 62/36/2 silver-bearing


Used approximately the last two years, one iron good for about two kit builds:

Walmart 30W 120 VAC, ~505 Ohms (sample of 4, cold), Model 5133-30W,
Hangzhou Greatstar Industrial Co. LTD

Also used Walmart EverStart solder.

I have used a some a Weller soldering iron station that has a knob for adjusting soldering iron temperature. Soldering iron temperature is adjusted by setting the voltage level at which a thyrisror in series with the soldering iron heating element turns on for both the positive and negative half cycles of the AC waveform. Thus there is the starting portion of each AC half cycle that is not applied to the resistive element of the soldering iron and hence less energy, as in lower temperature of the soldering iron tip.

Is there any possibility that the problems I have been having in the last few months with not hot enough soldering irons has anything to do with the AC wave shape my local power, i.e. ENERGY, company is distributing?

Again, thanks to all !!!

Best regards,
Tony, kb9yig



Sent from my iPad

On Jul 16, 2021, at 5:37 AM, Alan G4ZFQ <alan4alan@...> wrote:

Hello Tony,

I wonder if you have changed the type of solder?
I still use the "hazardous" lead/tin, the later lead-free is not nice to
use.
Otherwise maybe someone could recommend a temperature-controlled iron?
I hope you find a solution, you are still providing good SDRs.

73 Alan G4ZFQ