I must put this right. 15 ohms was wrong, sorry!
Explanation:
Since I have no manual I have found one on internet,
on the schematic someone has scribbled with a pen
3 x 15 ohms for the resistors, thats why I did say
15 ohms.
Last night I took them apart and resistors are 150
ohms and no nothing else.
Also the resistors arent fried, when inside the coil
they just looked fried to me however its just the
paint that got fried. I did measure them and they
all measure around 180 ohms, a tad high maybe however
at 20% tolerance they are ok.
What Jim writes below about L-4B suppressors is still correct.
I think I just put the crap back again.
Im sorry about the error.
73 Jim SM2EKM
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pentalab wrote:
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### No it doesn't. With his 3 x paralled 15 ohm resistor's... it means he has 5 ohms in total.... and the wrong value to start with !
The goals of a VHF
parasitic suppressor are to build one with a low VHF-Q that won't melt-down at 29MHz. Typical factory-stock suppressors have a Q of
c.
5 @ 100MHz. However, VHF suppressors can be built with a Q of
1.5.
This Q-decrease decreases VHF gain with the tradeoff of about 2% power decrease at 29MHz.
### which means the nichrome has to diss 26 watts. The STOCK L4B suppressor's are bullet proof.... and even more bullet proof, after u grnd the grids directly to chassis.... like several hundred other owner's have done. Rich... how many suppressor kits have you actually sold to L4B owners ??? This is truthfully the very 1st time in 30 years I have ever heard of anyone frying the suppressor in a L4B.... or a L4 for that matter. I don't even think it can be done. Now with just a 5 ohm suppressor... that's a diff story.
