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It could. Really the coil should be shorting out the resistors at HF frequencies so very little RF will pass through them. You don't have that Nichrome snake oil that was going around a few years ago,

My brain meant to type 4148, but my fingers had other ideas ;-) My plan of attack is also to use headers. I have the AUX-7 documentation so I'm good to go. Thanks for the confirmation. --lyndon

I’ve used 1N4148’s on DIP headers. 1N914’s work just as well. Somewhere on Ron’s page are the diagrams for setting the bands. 73, Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like

Quick and maybe easy question, Could a cold or poor solder joint on the Parasitic Resistors where they attach to the so called coil of the Plate connector cause my problems with the hot resistors?

From poking around the band modules on the AUX-7 I acquired, they just seem to be diodes connecting pin 1 to everything else, right? Is there any reason I can't just roll my own with 1N4001s or

The resistors I replaced were 2 watt 47 ohm carbon composition resistors just like the one's that exploded. I am still perplexed as to why these would run so hot as to burn up. All items in that

Probably not a huge issue. The L4B uses a pair of .001 uF (1000 pf) in parallel for .002 uF. So the value can vary a bit. The pair of 760 pF would be 1520 pF total. Fix your parasitic suppressors

It sounds like your resistors may be inductive. Metal composition are suggested here: https://www.ctrengineeringinc.com/parts-for-sale/specialized-and-specific-application-resistors/ Also suggested

Ok while running at the lower CW hv, I noticed a distinct smell of burning resistors. Took the amp case off and found both of the Parasitic resistors from the Plate in the Plate Choke to be burned. I

Hans, G0UPL , designer of the? VFO I used in my TTR-7 digital VFO has sent a link to an excellent white paper he wrote on the Si5351A phase noise. Well worth the read at:

Using the dummy load the L7 tunes just fine with the Plate knob just past mid on the 40 meter band. It tunes just fine as best I can tell. I am using the 7610 and in CW mode on the L7. Running about

It could be a couple of things. The L7 has a two section Load cap. Only half is used on the high bands. The second section is switched in parallel by the band switch for 20m through 160m. There are

Here you go. https://www.tedss.com/Catalog/Browse?searchString=Su2C1&inCategory=-

The complete re-drawn (Orcad) L-4PS schematic is in the 'Files' area of this groups.io ( http://groups.io ) , at

Same place in my L4B and L7 manuals. 73 -Jim NU0C "Ken, WA2LBI via groups.io" <wa2lbi@...> wrote: -- 73 -Jim NU0C

Jim; The second circuit breaker is between the bottom leg of the center-tapped input winding and the screw-terminal... it's drawn at a 45 degree angle. In this copy of the schematic, it's just below

The two circuit breakers are circled in the attached schematic. Ken WA2LBI [email protected]> wrote:

I just noticed that my L7 after for possible parasitic oscillations,, I note that the Load adjustment is only good when setting is about 0. I don't remember but that does not seem correct. I have

I was thinking the other day "I wonder what was actually happening"? This was in the late 70's, a common among DXers and Contesters was a dirt cheap thing to do to make your signal just jump and stand

Still can't find it.? ?And I have 4 x manuals for the 4 x l4b's.? its not on the L4PS? schematic.