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VK2ZRG > TECH 16.12.05 15:04l 40 Lines 1484 Bytes #999 (0) @ WW
BID : 1839_VK2ZRG
Read: DG5YM DL1LCA GUEST OE7FMI
Subj: Re: HELP TRANSISTOR BLV25
Path: DB0FHN<DB0MRW<DB0WUE<DK0WUE<7M3TJZ<ZL2BAU<VK2DOT<VK2XGJ<VK2IO<VK2WI
Sent: 051216/1137Z @:VK2WI.#SYD.NSW.AUS.OC #:1080 [SYDNEY] FBB7 $:1839_VK2ZRG
From: VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
To : TECH@WW
VK2ZRG/TPK 1.83d Msg #:1839 Date:16-12-05 Time:11:01Z
>R:051215/1844Z @:IZ0AWG.ILAZ.ITA.EU #:820 [ANZIO,RM,IT] $:1826_IK0BDO
>
Roberto IK0BDO wrote :-
>IK0BDO/TPK 1.83c Msg #:1826 Date:15-12-05 Time:0:29Z
>
>Do anybody can suggest me a possible substitution of high power 28 volt VHF
>transistor BLV25 with a similar, as close as possible, type ?
>I would not have to scrap my 300 watts transistoryzed two meters linear
>amplifier due to the blowing of their push-pull.
>Any suggestion welcome.
>73 ! Roberto IK0BDO.
Hello Roberto,
My Phillips manual lists this transistor as rated to 108 MHz
and 175 watts maximum output power. The closest Phillips type is a BLV33F
which is rated as 80 watts out in VHF linear class AB, at 225 MHz. This
transistor has the same case as the BLV25. The closest Motorola type is
a MRF329. The case of this one is similar but not identical. It probably
would fit OK. The MRF329 is rated for 100 to 500 MHz and 100w output in
class B, i.e. no standing current.
These transistors don't give as much power as the BLV25 and may no
longer be available. My manuals are fairly old...like me. If you have
access to the internet then I suggest you look there to see what's
available now. You may find a better replacement that way.
73s from Ralph VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
/ack
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