>
>
>
>On Thu, 11 Feb 1999 11:14:47 +0100 Carsten Esch
><carsten.esch@olympus-software.com> writes:
>>
>>Anyone with comments on the above mentioned inductor? How would this
>>thing work in a
>>
>>a. 3CX1500A7 amp
>>b. 3CX3000A7 amp
>>
>>covering 160-10m ? Or should I wound again my own coil?
>
>
>It sounds great but the proof is when it is used and survives several
>years of tuning.
? amen.
>It also seems a bit of an overkill for an 8877.
? How could we possiblly know this if the dimension of the ribbon was
not given? The tank circulating-current in an 8877 amplifier can easily
be 13A-rms. E>F. Johnson rated their 12.7mm/0.5" ribbon inductors
(222-series) at 15A.
>Many have reported problems with arcing and parasitics when a roller coil
>is used, particularly the large edgewound Multronics style.
? I used such an inductor in my 8171 amplifier. I shorted the unused
turns with 5/8" strap. There was no arcing at the inductor. However,
there was initially an, intermittent vhf parasite. The cure was to use
a lower vhf-Q anode parasitic-suppressor.
>
>Any idea who actually manufacturers the coil? I hope it is not a certain
>West Coast outfit.
? Are you thinking about the mfg. that uses Delrin for coil forms in
roller coils.?
>What is the price?
>
? Surplus Sales sells the 5.uH Collins 180t roller-L for $35. Fair
Radio sells the same item for $10.
>73 Carl KM1H
>
>>Regards,
>>
>>Carsten, DL6LAU
>>
>>? 2-10 kw Power Handling ?
>>? Taper Wound Front End ?
>>? Edge Wound Coil All Silver Plated ?
>>
>>(IRV)RI-40: It's here at last! The ultimate variable inductor. Isn't
>>your tuner or amplifier project worth the very best? Made exclusively
>>for Surplus Sales of Nebraska.
>>.1-40 uH variable edge wound inductor. Taper wound lower end (higher
>>Q) for better results beyond 20 MHz. Enough inductance for work below 160
>>meters too. All rf surfaces are thick silver plated. Quad 10 amp
>>contact sets on all rotating connections; coil to rotar; rotor to
>>shaftarmature; shaft armature to end
>>plate contacts. There are no weak links with our mil-spec design.
>>
? "This ship is absolutely unsinkable due to the use of watertight
compartments."
>>Perfect for 2-10 kw antenna tuners, tank network for amplifier or
>>anywhere a larger, high Q, variable inductance is required. Be sure to
>>use our Turns Counter (SHW)TCV.
>>
>>5" wide, 5-1/4" high, 12-1/2" end to end, maximum dimensions. 1/4"
>>shaft. Optional end stop kit for motor drive schemes. Add $ for kit,
>>pn
>>(IRV)RI-40ESK.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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