Re: RD16HHF1 power curve flattening...some
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Dr. Schmidt, It looks like the KST10 is the surface mount version of the KSP10.? It has the same specs as the MPSH10.
Marco - KG5PRT
On Mon, Mar 12, 2018 at 10:01 AM, K9HZ <bill@...> wrote: Perfect Glenn.? Now if we can find current SMD parts to replace the 3904¡¯s in place, this is a very nice upgrade.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ? On Mar 11, 2018, at 11:02 PM, Glenn < glennp@...> wrote: I completed my mockup of the PA driver stages. as previous post:
- used MPSH10's in all stages.?
- Used FT37-43 toroids all wound with 10 turns 0.25mm wire either tri- or bi-filar according to original Sch.
- Bypassed all emitter resistors with a 220pF cap.
- swept from C80 input to T10 secondary (as wound)
Result is a very flat response. Better than 1db from 3Mhz to 54MHz. glenn vk3pe
<uBITX_PA_driver_stages_all emitter res bypassed with 220pF 120318.jpg>
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