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Re: Plate blocking caps YC156
Thanks for all the suggestions. The HT57's look like the easiest capacitors to get. Are HT57's now being made in China by HyEnergy? I see a lot of what looks like clone? HT57's for sale on that
By tardivat@... · #37053 ·
Re: Plate blocking caps YC156
How about a CM88 CDE?? The one I have in my hand now is literally bigger than my door knob to the room.? 10KV, 30A @ 1 Mhz.? :) 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com
By Jeff AC0C · #37052 ·
Re: Dielectric grease for roller inductors ?
Call Oren Elliott and ask what they use. They proviided me a blob in a pill bottle decades ago but forget the name. Also Palstar. I wouldnt use anything but what the pros use. Carl
By Carl · #37051 ·
Re: Dielectric grease for roller inductors ?
I use lubriplate lithium grease on most of my shafts. Someone recommended it to me years ago. So far, nothing I have used it on has gummed up, and no electrical problems have presented themselves.
By Clint, VE3CMQ <ve6cmm@...> · #37050 ·
Dielectric grease for roller inductors ?
I? have a RI-40 ribbon? style (3/8"? x .082")? roller? coil....with? no? lube on? it.? ? Can? I? use? permatex? dielectric? grease? on? it ? My? RI-50 roller? coil? came? with?
By Jim VE7RF · #37049 ·
Re: Plate blocking caps YC156
Nope,? you? got it? ass backwards.? Measure? the plate? block? cap? current if u don't? believe me.? W8JI, W8ZR, and John? Lyles? also? concur. At? 29? mhz,? the anode? to? chassis?
Re: Plate blocking caps YC156
Not even close at 2.25" wide by 3" tall.. Ive vever used them above 160 anyway and that was in an Omega match of a shunt fed big 4 el 10/15/20 yagis top loaded 100' tower in the mid 80's. Resonant
By Carl · #37047 ·
Re: Plate blocking caps YC156
Jim, Why should the circulating RF current you calculated, depending on Xc of the YC-156, flow through the plate blocking cap? In the 29MHz case most anode capacity will be within the tube and
By Peter Voelpel · #37046 ·
Re: Plate blocking caps YC156
Those style? caps? are? way? too? big in diam,? like? 4-5" !? ? They? end? up? adding too? much? stray? C.? ?Been? there,? done? that. HT-57? in 200? pf is rated at? ?15A?
By Jim VE7RF · #37045 ·
Re: Plate blocking caps YC156
The 57/857 are toy sizes, the 859's are for the big boys Carl
By Carl · #37044 ·
Re: Plate blocking caps YC156
I would prefer a single capacitor any time. 73 Peter https://www.ebay.de/itm/for-CCG81-4U-800PF-K-25KV-90KVA-high-frequency-volta
By Peter Voelpel · #37043 ·
Re: Plate blocking caps YC156
I used this trick on my two x 3-1000z amplifier. I cut and wound a flat coil and placed it as you suggested. Higher frequencies gained a ton of power. Before my C1 cap was always min. C
By W7WRX · #37042 ·
Re: Reply from ECONCO
Email? Econco.? Only? difference is? the? high? mu-grid.? ?They also? may? well? take? your F1's in? trade for? some F7's. Jim? VE7RF
By Jim VE7RF · #37041 ·
Re: Plate blocking caps YC156
HEC? (high energy? corp) has? detailed? current? vs? freq? info). For? 10-10? YC-156? amps,? use? 4 x? HT-57's.? ?200 pf? are? the? go? to? standard.? ?The? 200? pf? HT-57?
By Jim VE7RF · #37040 ·
Re: Plate blocking caps YC156
Email Dr Alex. Log into his page at www.ur4ll.net He will look after you and get you the correct capacitor, at the most reasonable price. 73, Alek. VK6APK
By Alek Petkovic · #37039 ·
Re: 3CX3000F7 10-80m
RFpARTS used to sell a heavy duty Pi Style choke that was rated to at least 3 amps. It had 10 pie sections on it with gaps and it no resonances in the ham bands. I wonder why they stopped selling
By tardivat@... · #37038 ·
Re: Reply from ECONCO
Will Econco? rebuild a 3cx3000F1 into a 3cx3000F7. I have a few genuine F1's which I wish were F7's Anyone know if this is possible? Henry
By tardivat@... · #37037 ·
Plate blocking caps YC156
Anyone suggest a plate blocking cap brand? The only capacitors that i can? get RF current data on is the HT57's. I was thinking of using a couple of? HT57 1000pf in parallel. Its really hard getting
By tardivat@... · #37036 ·
Re: 3CX3000F7 10-80m
A? 50 ohm? glitch? resistor...and a fast,? correctly? sized / rated HV? fuse? will? save? just? about? any fault. Note the? part? about correctly? sized? HV? fuse.? 1A? for? a
By Jim VE7RF · #37035 ·
Re: Coil 3.72 software
http://ham-radio.com/k6sti/coil.zip Above? is? the? zip? file.? ? Note, SS? ?has? been? removed? from? the? master? list. Shoulda left it on.? SS? is? so? bad,? it was? at the?
By Jim VE7RF · #37034 ·