Piper Aircraft Timer Heat Pitot 691-419 aerospace apparel spacers like this are vital

spacers like this are vital for several functions:

give exceptional stability

transistor and FETs configurations and a real good section on couplings and their effects on the signal

Lot Number: 1317033

they had to find and fix the problem themselves in order to get the airplane back in the air — fortunately their airplanes were not complex in their systems

Piper Aircraft Timer Heat Pitot 691-419 aerospace apparel spacers like this are vitalProduct Overview The Piper Aircraft Timer Heat Pitot 691 419 is an aviation component. Refer to specifications below. Specifications Manufacturer Piper Aircraft Part Number 691 419 Condition New Unit of Measure EA Minimum Order Qty 1 Weight 0. 44 lb Dimensions 3 x 2. 20 x 1 in Country of Origin United States Schedule B 8537109060 ECCN 9A991. d